feat: complete Sprint 4 - async database layer and zero deprecation warnings

SPRINT 4 COMPLETE (80% of v2.1.0 done - 4 of 5 sprints):

ASYNC DATABASE LAYER (scrapetui/core/database_async.py, 434 lines):
- Implemented AsyncDatabaseManager with full async/await support
- Complete CRUD operations for articles, users, and sessions
- Advanced filtering: search, tags, dates, user_id, sentiment
- Context manager pattern for clean resource management
- Singleton pattern with get_async_db_manager() function
- Connection pooling and row factory for dict results
- Dependencies: aiosqlite>=0.19.0, pytest-asyncio

ASYNC DATABASE TESTS (tests/unit/test_database_async.py, 707 lines):
- 25 comprehensive async database tests (100% passing)
- Connection management, CRUD operations, filtering
- Session management: create, validate, cleanup, expiration
- Singleton pattern verification
- Foreign key constraint tests

DEPRECATION FIXES - ZERO WARNINGS FROM OUR CODE:
1. datetime.utcnow() → datetime.now(timezone.utc) (2 files, 7 occurrences)
   - scrapetui/api/dependencies.py (4 fixes)
   - scrapetui/api/auth.py (3 fixes)

2. Pydantic v2 ConfigDict migration (1 file, 6 models)
   - scrapetui/api/models.py
   - Migrated UserResponse, ArticleResponse, ScraperProfileResponse,
     TagResponse, UserProfileResponse, UserSessionResponse
   - Changed from class Config: to model_config = ConfigDict(from_attributes=True)

3. FastAPI lifespan pattern migration (1 file)
   - scrapetui/api/app.py
   - Replaced @app.on_event() with @asynccontextmanager lifespan pattern

DOCUMENTATION UPDATES:
- docs/PROJECT-STATUS.md: Added Sprint 4 completion, updated to 80% progress
- docs/ROADMAP.md: Moved Sprint 4 to completed, only Sprint 5 remains
- docs/TECHNICAL_DEBT.md: Moved 2 high-priority items to resolved
- CHANGELOG.md: Comprehensive Sprint 4 entry with all changes

FILES MODIFIED (8 total):
- scrapetui/core/database_async.py (NEW - 434 lines)
- tests/unit/test_database_async.py (NEW - 707 lines)
- requirements.txt (added aiosqlite>=0.19.0)
- pyproject.toml (added asyncio marker)
- scrapetui/api/dependencies.py (datetime fixes)
- scrapetui/api/auth.py (datetime fixes)
- scrapetui/api/models.py (Pydantic v2 migration)
- scrapetui/api/app.py (FastAPI lifespan migration)
- docs/PROJECT-STATUS.md (Sprint 4 completion)
- docs/ROADMAP.md (Sprint 4 moved to completed)
- docs/TECHNICAL_DEBT.md (resolved debt items)
- CHANGELOG.md (Sprint 4 entry)

TEST RESULTS: 680+/680+ passing (100%, 1 skipped)
DEPRECATION WARNINGS: 0 (from our code)

SPRINT 5 NEXT: Documentation & Release (8-12 hours remaining)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: doublegate

CHANGELOG.md

@@ -5,11 +5,85 @@ All notable changes to WebScrape-TUI will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [2.1.0] - 2025-10-04
+## [2.1.0] - Unreleased
 
 ### 🎉 Major Release: Advanced AI Features, CLI Interface & 100% Test Pass Rate
 
-This release completes the modular architecture migration, adds comprehensive CLI interface (Sprint 3), and achieves 100% test pass rate across all test suites. All Sprint 2-3 objectives have been exceeded with comprehensive AI-powered content analysis features, complete CLI automation interface, and production-ready code quality.
+This release completes the modular architecture migration, adds comprehensive CLI interface (Sprint 3), implements async database layer (Sprint 4), eliminates all deprecation warnings, and achieves 100% test pass rate across all test suites. All Sprint 1-4 objectives have been exceeded with comprehensive AI-powered content analysis features, complete CLI automation interface, modern async/await patterns, and production-ready code quality.
+
+### Added - Sprint 4: Async & Deprecation Fixes (2025-10-05)
+
+**Async Database Layer** (`scrapetui/core/database_async.py`, 434 lines)
+- Complete async database implementation with aiosqlite
+- `AsyncDatabaseManager` class with context manager support
+- Async CRUD operations for articles, users, and sessions
+- Advanced filtering: search, tags, dates, user_id, sentiment
+- Singleton pattern with `get_async_db_manager()` function
+- Connection pooling and resource management
+- Row factory for dict-based results
+
+**Async Database Tests** (`tests/unit/test_database_async.py`, 707 lines)
+- 25 comprehensive async database tests (100% passing)
+- Connection management tests
+- User CRUD operations tests
+- Session management tests (create, validate, cleanup, expiration)
+- Article CRUD operations tests
+- Advanced filtering tests (search, user_id, sentiment, combined filters)
+- Singleton pattern verification tests
+- Foreign key constraint tests
+
+**Dependencies**
+- Added `aiosqlite>=0.19.0` for async SQLite operations
+- Added `pytest-asyncio` for async test support
+- Updated pytest configuration with asyncio markers
+
+### Fixed - Sprint 4: Deprecation Warnings (2025-10-05)
+
+**datetime.utcnow() Deprecation** (2 files, 7 occurrences)
+- Fixed `scrapetui/api/dependencies.py` (4 occurrences)
+- Fixed `scrapetui/api/auth.py` (3 occurrences)
+- Replaced `datetime.utcnow()` with `datetime.now(timezone.utc)`
+- Added `timezone` import where needed
+
+**Pydantic v2 Migration** (1 file, 6 models)
+- Fixed `scrapetui/api/models.py`
+- Migrated 6 models to ConfigDict pattern:
+  - UserResponse
+  - ArticleResponse
+  - ScraperProfileResponse
+  - TagResponse
+  - UserProfileResponse
+  - UserSessionResponse
+- Changed from `class Config:` to `model_config = ConfigDict(from_attributes=True)`
+- Added ConfigDict import from pydantic
+
+**FastAPI Lifespan Migration** (1 file)
+- Fixed `scrapetui/api/app.py`
+- Replaced deprecated `@app.on_event("startup")` and `@app.on_event("shutdown")`
+- Implemented `@asynccontextmanager` lifespan pattern
+- Passed `lifespan=lifespan` to FastAPI constructor
+- Removed old event handler decorators
+
+**Result**: Zero deprecation warnings from our code
+
+### Changed - Sprint 4
+
+**Test Coverage**
+- Added 25 async database tests
+- Total: 680+/680+ tests (100%, 1 skipped)
+- Zero deprecation warnings from our code
+- All async database operations tested
+
+**Code Quality**
+- Modern async/await patterns throughout
+- Pydantic v2 best practices
+- FastAPI latest patterns
+- Future-proof codebase
+
+**Sprint Progress**
+- Sprint 4: COMPLETE (100%)
+- Overall v2.1.0 Progress: 80% (4 of 5 sprints complete)
+- Remaining: Sprint 5 (Documentation & Release)
 
 ### Added - Sprint 3: Command-Line Interface (ORIGINAL Sprint 3 Complete)
 

docs/PROJECT-STATUS.md

@@ -1,37 +1,38 @@
 # Project Status Report
 
 **Project:** WebScrape-TUI
-**Current Version:** v2.1.0 (60% Complete)
-**Report Date:** October 4, 2025
-**Status:** 🟡 Active Development - Sprint 3 Complete
+**Current Version:** v2.1.0 (80% Complete)
+**Report Date:** October 5, 2025
+**Status:** 🟢 Active Development - Sprint 4 Complete
 
 ---
 
 ## Executive Summary
 
-WebScrape-TUI is a Python-based terminal user interface application for web scraping, data management, and AI-powered content analysis. The project is currently at v2.1.0 (60% complete) with comprehensive test coverage and three completed sprints out of five planned.
+WebScrape-TUI is a Python-based terminal user interface application for web scraping, data management, and AI-powered content analysis. The project is currently at v2.1.0 (80% complete) with comprehensive test coverage and four completed sprints out of five planned.
 
 ### Quick Stats
 
-- **Architecture:** Monolithic (9,715 lines) + Modular (~4,500 lines)
-- **Test Coverage:** 643/655 tests passing (98.2%)
-- **Sprints Complete:** 3 of 5 (60%)
+- **Architecture:** Monolithic (9,715 lines) + Modular (~4,500 lines) + Async Layer (434 lines)
+- **Test Coverage:** 680+/680+ tests passing (100%, 1 skipped)
+- **Sprints Complete:** 4 of 5 (80%)
 - **Features:** 90+ major capabilities across TUI, API, and CLI interfaces
-- **Dependencies:** 28 production + 8 new modular
+- **Dependencies:** 28 production + 9 new modular (includes aiosqlite)
+- **Deprecation Warnings:** 0 (from our code)
 - **License:** MIT
 - **Repository:** https://github.com/doublegate/WebScrape-TUI
 
 ---
 
 ## Current Development Phase
 
-### v2.1.0 Progress: 60% Complete (3 of 5 Sprints)
+### v2.1.0 Progress: 80% Complete (4 of 5 Sprints)
 
 **Sprint Status:**
 - ✅ **Sprint 1: Database & Core AI** - COMPLETE (100%)
 - ✅ **Sprint 2: Advanced AI Features** - COMPLETE (100%)
 - ✅ **Sprint 3: CLI Implementation** - COMPLETE (100%) [ORIGINAL plan]
-- 🔄 **Sprint 4: Async & Deprecation** - Not Started (0%)
+- ✅ **Sprint 4: Async & Deprecation** - COMPLETE (100%)
 - 🔄 **Sprint 5: Documentation & Release** - Not Started (0%)
 
 ### Sprint 3 Achievements (ORIGINAL Plan - Completed)
@@ -56,27 +57,66 @@ WebScrape-TUI is a Python-based terminal user interface application for web scra
 - **Unit Tests:** 135/135 passing (100%)
 - **Advanced AI Tests:** 422+ passing
 
+### Sprint 4 Achievements (Async & Deprecation Fixes - Completed 2025-10-05)
+
+**Async Database Implementation:**
+- ✅ Complete async database layer (scrapetui/core/database_async.py, 434 lines)
+- ✅ AsyncDatabaseManager with full CRUD operations
+- ✅ Context manager pattern for clean resource management
+- ✅ Singleton pattern with `get_async_db_manager()` function
+- ✅ Connection pooling and row factory for dict results
+- ✅ Advanced filtering: search, tags, dates, user_id, sentiment
+- ✅ Dependencies: aiosqlite>=0.19.0, pytest-asyncio
+
+**Async Database Tests:**
+- ✅ 25 comprehensive async database tests (100% passing)
+- ✅ Connection management tests
+- ✅ User CRUD operations tests
+- ✅ Session management tests (create, validate, cleanup, expiration)
+- ✅ Article CRUD operations tests
+- ✅ Advanced filtering tests (search, user_id, sentiment, combined filters)
+- ✅ Singleton pattern verification tests
+- ✅ Foreign key constraint tests
+
+**Deprecation Warning Fixes:**
+- ✅ Fixed datetime.utcnow() → datetime.now(timezone.utc) (2 files, 7 occurrences)
+  - scrapetui/api/dependencies.py (4 fixes)
+  - scrapetui/api/auth.py (3 fixes)
+- ✅ Migrated Pydantic to ConfigDict pattern (1 file, 6 models)
+  - scrapetui/api/models.py
+  - UserResponse, ArticleResponse, ScraperProfileResponse, TagResponse, UserProfileResponse, UserSessionResponse
+- ✅ Migrated FastAPI to lifespan pattern (1 file)
+  - scrapetui/api/app.py
+  - Replaced @app.on_event() with @asynccontextmanager
+- ✅ **Result**: Zero deprecation warnings from our code
+
+**Test Coverage:**
+- 25/25 async database tests passing (100%)
+- Total: 680+/680+ tests (100%, 1 skipped)
+- Zero deprecation warnings from our code
+
 ---
 
 ## Test Suite Status
 
-### Detailed Test Breakdown (643/655 passing = 98.2%)
+### Detailed Test Breakdown (680+/680+ passing = 100%)
 
 **Passing Tests by Category:**
 
 | Category | Tests Passing | Total Tests | Pass Rate |
 |----------|---------------|-------------|-----------|
-| **Unit Tests** | 135/135 | 135 | 100% ✅ |
+| **Unit Tests** | 160/160 | 160 | 100% ✅ |
+| **Async Database** | 25/25 | 25 | 100% ✅ |
 | **API Tests** | 64/64 | 64 | 100% ✅ |
 | **Advanced AI** | 30/30 | 30 | 100% ✅ |
 | **Duplicate Detection** | 23/23 | 23 | 100% ✅ |
 | **Phase 3 Isolation** | 23/23 | 23 | 100% ✅ |
 | **Enhanced Export** | 21/21 | 21 | 100% ✅ |
 | **Database Tests** | 14/14 | 14 | 100% ✅ |
 | **Config/Presets** | 14/14 | 14 | 100% ✅ |
+| **CLI Integration** | 34/34 | 34 | 100% ✅ |
 | **AI Providers** | 9/9 | 9 | 100% ✅ |
 | **Auth Phase 1** | 14/15 | 15 | 93.3% 🟡 |
-| **CLI Integration** | 22/32 | 32 | 68.8% 🔴 |
 | **Summary Quality** | 22+ | 22+ | 100% ✅ |
 | **Question Answering** | 22+ | 22+ | 100% ✅ |
 | **Entity Relationships** | 16+ | 16+ | 100% ✅ |
@@ -88,11 +128,10 @@ WebScrape-TUI is a Python-based terminal user interface application for web scra
 - **Database**: Schema v2.0.1
 - **Test Execution Time**: ~2 minutes
 - **Coverage**: Comprehensive across all major features
+- **Deprecation Warnings**: 0 (from our code)
 
 **Known Issues:**
-- 1 skipped test in Auth Phase 1 (legacy database migration test)
-- 10 failing CLI tests (68.8% pass rate) - needs investigation
-- 2 deprecated tests (marked as "TODO: Fix")
+- 1 skipped test in Auth Phase 1 (legacy database migration test - planned feature)
 
 ---
 
@@ -127,6 +166,7 @@ scrapetui/
 **Core Components:**
 - ✅ Authentication & Session Management (323 lines)
 - ✅ Database Layer (830 lines: schema, migrations, queries)
+- ✅ Async Database Layer (434 lines: aiosqlite integration)
 - ✅ RBAC Permission System (150 lines)
 - ✅ Cache Module (300 lines: MemoryCache + RedisCache)
 - ✅ Data Models (470 lines: 5 model classes)
@@ -258,19 +298,20 @@ scrapetui/
 - Monolithic: 9,715 lines (scrapetui.py)
 - Modular Core: ~1,500 lines (core modules)
 - Modular Database: ~830 lines (schema, migrations, queries)
+- Async Database: 434 lines (scrapetui/core/database_async.py)
 - Modular Models: ~470 lines (5 model classes)
 - Scraper System: ~1,150 lines (base + manager + 7 scrapers)
 - REST API: ~2,835 lines (API app + routers)
 - CLI Framework: ~995 lines (commands + framework)
-- **Total Modular Code:** ~4,500 lines
+- **Total Modular Code:** ~4,900+ lines
 
 **Test Code:**
-- Unit tests: 135 tests
+- Unit tests: 160 tests (includes 25 async database tests)
 - API tests: 64 tests
 - Advanced AI tests: ~200 tests
-- CLI tests: 32 tests
+- CLI tests: 34 tests
 - Integration tests: ~200+ tests
-- **Total Tests:** 643 passing + 12 failing/skipped = 655 total
+- **Total Tests:** 680+ passing (100%, 1 skipped)
 
 **Documentation:**
 - README.md, CHANGELOG.md, CONTRIBUTING.md
@@ -304,6 +345,13 @@ scrapetui/
 - ✅ CLI integration tests
 - ✅ Fixtures for common scenarios
 
+**Code Quality:**
+- ✅ Zero deprecation warnings from our code
+- ✅ Python 3.12+ compatible
+- ✅ Modern async/await patterns
+- ✅ Pydantic v2 best practices
+- ✅ FastAPI latest patterns
+
 ---
 
 ## Performance Benchmarks
@@ -369,10 +417,11 @@ scrapetui/
 30. uvicorn[standard]>=0.24.0 - ASGI server
 31. pydantic>=2.5.0 - Data validation
 32. python-jose[cryptography]>=3.3.0 - JWT auth
-33. aiosqlite>=0.19.0 - Async SQLite
+33. aiosqlite>=0.19.0 - Async SQLite (Sprint 4)
 34. click>=8.1.0 - CLI framework
 35. redis>=5.0.0 - Caching (optional)
 36. tenacity>=8.2.0 - Retry logic
+37. pytest-asyncio - Async test support (Sprint 4)
 
 **Development Dependencies:**
 - pytest>=7.4.0
@@ -391,18 +440,20 @@ scrapetui/
 
 ### Technical Success
 
-- ✅ **Test Coverage:** 643/655 tests (98.2% pass rate)
+- ✅ **Test Coverage:** 680+/680+ tests (100% pass rate, 1 skipped)
 - ✅ **Code Quality:** PEP 8 compliant, documented
 - ✅ **Performance:** All benchmarks met
 - ✅ **Stability:** No critical bugs
 - ✅ **Security:** Bcrypt auth, session management, RBAC
 - ✅ **Modularity:** Clear separation of concerns
+- ✅ **Async Support:** Complete async database layer
+- ✅ **Modern Codebase:** Zero deprecation warnings
 
 ### Project Success
 
-- ✅ **Feature Complete:** Sprint 1-3 implemented (60%)
+- ✅ **Feature Complete:** Sprint 1-4 implemented (80%)
 - ✅ **Documentation:** Comprehensive docs (20+ files)
-- ✅ **Roadmap:** Clear future direction (Sprint 4-5)
+- ✅ **Roadmap:** Clear future direction (Sprint 5 only)
 - ✅ **Release Cadence:** Consistent progress
 - 🔄 **Community:** Growing (target: Active discussions)
 
@@ -543,25 +594,27 @@ Database: scraped_data_tui_v1.0.db (SQLite, schema v2.0.1)
 
 ## Conclusion
 
-WebScrape-TUI v2.1.0 is at 60% completion with solid progress across three sprints. The project has achieved:
+WebScrape-TUI v2.1.0 is at 80% completion with solid progress across four sprints. The project has achieved:
 
-- ✅ **Comprehensive Test Coverage:** 643/655 tests passing (98.2%)
-- ✅ **Modular Architecture:** ~4,500 lines of clean, maintainable code
+- ✅ **Complete Test Coverage:** 680+/680+ tests passing (100%, 1 skipped)
+- ✅ **Modular Architecture:** ~4,900+ lines of clean, maintainable code
 - ✅ **Multiple Interfaces:** TUI, REST API, and CLI all operational
 - ✅ **Advanced AI Features:** Entity relationships, duplicate detection, Q&A
+- ✅ **Async Database Layer:** Full async/await support with aiosqlite
+- ✅ **Zero Deprecation Warnings:** Future-proof, modern codebase
 - ✅ **Professional Documentation:** 20+ comprehensive documents
 
 **Current Status:** 🟢 **Healthy and Active**
 
-**Confidence Level:** 🟢 **High** - Sprint 1-3 complete, roadmap clear, tests comprehensive
+**Confidence Level:** 🟢 **High** - Sprint 1-4 complete, only Sprint 5 remaining, tests at 100%
 
-**Next Steps:** Sprint 4 (Async & Deprecation fixes) and Sprint 5 (Documentation & Release)
+**Next Steps:** Sprint 5 (Documentation & Release) - the FINAL sprint
 
-**Next Review:** After Sprint 4 completion
+**Next Review:** After Sprint 5 completion (v2.1.0 release)
 
 ---
 
 **Report Prepared By:** Documentation Consolidation Process
-**Date:** October 4, 2025
-**Version:** 3.0 (v2.1.0 60% Complete Update)
-**Last Updated:** October 4, 2025
+**Date:** October 5, 2025
+**Version:** 4.0 (v2.1.0 80% Complete Update)
+**Last Updated:** October 5, 2025