feat: Complete workflow and dependency management system v1.9.0

Major Features Added:
- 🔄 Complete workflow orchestration with job dependency management
- 🗄️ New hammerwork_workflows table and extended job schema
- 🚀 Full workflow API: enqueue, status, dependency resolution, cancellation
- ⚡ Advanced dependency features with failure propagation and cycle detection
- 📊 Completed MySQL encryption deserialization implementation

Database Enhancements:
- PostgreSQL: Native UUID arrays, JSONB dependencies, optimized indexes
- MySQL: JSON columns, proper constraints, feature parity with PostgreSQL
- Workflow validation with topological sorting for cycle detection
- Transactional workflow operations ensuring data consistency

API Extensions:
- JobGroup workflow builder with fluent API (.then(), .add_parallel_jobs())
- enqueue_workflow() - Atomic workflow insertion with validation
- get_workflow_status() - Retrieve workflow state and job progress
- resolve_job_dependencies() - Automatic dependency satisfaction
- get_ready_jobs() - Efficient ready-to-execute job queries
- fail_job_dependencies() - Intelligent failure cascade with policies
- cancel_workflow() - Clean workflow cancellation

Implementation Completeness:
- Replaced all todo\!() placeholders with full implementations
- Added comprehensive error handling and UUID conversion
- Helper methods for transactional job insertion
- Complete MySQL encryption deserialization matching PostgreSQL

Failure Policies:
- FailFast: Stop workflow on any job failure
- ContinueOnFailure: Continue independent jobs after failures
- Manual: Require intervention for failure handling

Testing:
- All 264 tests pass including 11 workflow-specific tests
- Full feature parity between PostgreSQL and MySQL
- Comprehensive dependency resolution and validation coverage

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

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

Author: CodingAnarchy

CHANGELOG.md

@@ -5,6 +5,57 @@ All notable changes to this project 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).
 
+## [1.9.0] - 2025-07-14
+
+### Added
+- **🔄 Complete Workflow and Dependency Management System**
+  - Implemented full workflow orchestration capabilities with job dependency management
+  - Added `JobGroup` workflow builder with fluent API for creating complex job pipelines
+  - Support for sequential job chains using `.then()` method
+  - Support for parallel job execution using `.add_parallel_jobs()` method
+  - Comprehensive dependency resolution engine that automatically manages job execution order
+  - Workflow validation with circular dependency detection using topological sorting
+  - Three failure policies: `FailFast`, `ContinueOnFailure`, and `Manual` intervention modes
+
+- **🗄️ Database Schema and Storage**
+  - New `hammerwork_workflows` table for workflow metadata tracking
+  - Extended `hammerwork_jobs` table with dependency fields: `depends_on`, `dependents`, `dependency_status`, `workflow_id`, `workflow_name`
+  - Optimized database indexes for efficient dependency resolution queries
+  - PostgreSQL implementation uses native UUID arrays and JSONB for dependencies
+  - MySQL implementation uses JSON columns with proper constraint validation
+
+- **🚀 Queue Interface Extensions**
+  - `enqueue_workflow()` - Validates and atomically inserts entire workflows
+  - `get_workflow_status()` - Retrieves workflow metadata and current execution state
+  - `resolve_job_dependencies()` - Updates dependency status when jobs complete successfully
+  - `get_ready_jobs()` - Efficiently finds jobs ready for execution (no unsatisfied dependencies)
+  - `fail_job_dependencies()` - Cascades failure through dependency graph with configurable policies
+  - `get_workflow_jobs()` - Retrieves all jobs within a specific workflow
+  - `cancel_workflow()` - Cancels workflow and marks all pending jobs as failed
+
+- **⚡ Advanced Dependency Features**
+  - Automatic dependency satisfaction tracking with real-time status updates
+  - Intelligent failure propagation that respects workflow failure policies
+  - Support for complex dependency graphs with multiple fan-in/fan-out patterns
+  - Transactional workflow operations ensuring data consistency
+  - Workflow statistics tracking: total jobs, completed jobs, failed jobs
+
+### Fixed
+- **🔧 Implementation Completeness**
+  - Replaced all `todo!()` placeholders in workflow code with full implementations
+  - Added comprehensive error handling for workflow validation and execution
+  - Implemented proper UUID conversion handling between PostgreSQL and MySQL
+  - Added helper methods `insert_job_in_transaction()` for both database backends
+  - Fixed compilation issues and ensured feature parity between PostgreSQL and MySQL
+
+### Enhanced
+- **📊 MySQL Encryption Deserialization**
+  - Completed MySQL encryption deserialization implementation to match PostgreSQL
+  - Updated all MySQL SQL queries to include encryption fields using `JOB_SELECT_FIELDS` constant
+  - Added encryption helper methods: `build_encryption_config()`, `parse_retention_policy()`, `build_encrypted_payload()`
+  - Proper handling of MySQL JSON types vs PostgreSQL arrays for encryption metadata
+  - Full feature parity between PostgreSQL and MySQL encryption implementations
+
 ## [1.8.4] - 2025-07-14
 
 ### Added

Cargo.toml

@@ -9,7 +9,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
-version = "1.8.4"
+version = "1.9.0"
 edition = "2024"
 license = "MIT"
 repository = "https://github.com/CodingAnarchy/hammerwork"
@@ -19,7 +19,7 @@ documentation = "https://docs.rs/hammerwork"
 rust-version = "1.86"
 
 [workspace.dependencies]
-hammerwork = { version = "1.8.0", path = "." }
+hammerwork = { version = "1.9.0", path = "." }
 tokio = { version = "1.0", features = ["full"] }
 sqlx = { version = "0.8", features = ["runtime-tokio-rustls", "chrono", "uuid", "json"] }
 chrono = { version = "0.4", features = ["serde"] }