Fix production readiness claims across ALL documentation

Found and fixed overly confident claims in multiple files:

- README.md: 'Beta Stage - Near Production Ready' → 'Alpha Stage - Development/Testing Use'
- README.md: Changed feature maturity table from 'Production Ready' to 'Development Ready'
- README.md: 'v1.0 (Production Ready)' → 'v1.0 (Future Production Consideration)'
- docs/guides/IMPLEMENTATION_SUMMARY.md: Removed 'production-ready system' claim
- PRODUCTION_READINESS_REPORT.md: 'PRODUCTION GRADE' → 'IMPROVED FOR ALPHA'

All documentation now consistently presents DriftDB as improved alpha software
suitable for development/testing, not production use.

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: DavidLiedle

PRODUCTION_READINESS_REPORT.md

@@ -59,7 +59,7 @@ DriftDB has undergone comprehensive evaluation and critical fixes. Major archite
 - **Transaction support**: BEGIN, COMMIT (ROLLBACK pending)
 - Prepared statements and query optimization
 
-### Security & Authentication ✅ **PRODUCTION GRADE**
+### Security & Authentication ✅ **IMPROVED FOR ALPHA**
 - MD5 password authentication
 - Connection rate limiting (30 connections/min)
 - Query rate limiting (100 queries/sec, adaptive)

README.md

@@ -557,8 +557,8 @@ MIT
 
 ## Production Readiness
 
-### ⚠️ Beta Stage - Near Production Ready
-DriftDB is currently in **beta** stage and approaching production readiness.
+### ⚠️ Alpha Stage - Development/Testing Use
+DriftDB is currently in **alpha** stage with significant recent improvements but requires additional testing and validation.
 
 **Current Status:**
 - Core functionality implemented and working well
@@ -582,9 +582,9 @@ DriftDB is currently in **beta** stage and approaching production readiness.
 
 ### Feature Maturity
 
-| Component | Status | Production Ready |
+| Component | Status | Development Ready |
 |-----------|--------|------------------|
-| Core Storage Engine | 🟡 Beta | Almost |
+| Core Storage Engine | 🟡 Alpha | For Testing |
 | SQL Execution | 🟢 Working | Yes |
 | Time Travel Queries | 🟢 Working | Yes |
 | PostgreSQL Protocol | 🟢 Working | Yes |
@@ -649,9 +649,10 @@ DriftDB is currently in **beta** stage and approaching production readiness.
 - 📋 Stress testing
 - 📋 Cloud deployment support
 
-### v1.0 (Production Ready)
-- 📋 Battle-tested in production
-- 📋 Full documentation
+### v1.0 (Future Production Consideration)
+- 📋 Extensive testing and validation
+- 📋 Full production documentation
+- 📋 Security audits and performance testing
 - 📋 Performance guarantees
 - 📋 High availability
 - 📋 Enterprise features

docs/guides/IMPLEMENTATION_SUMMARY.md

@@ -159,4 +159,4 @@ python3 test_explain_plan.py
 
 ## Summary
 
-DriftDB has evolved from a basic time-travel database to a production-ready system with near-complete SQL support. The implementation prioritizes correctness, compatibility with PostgreSQL clients, and production reliability over raw performance. The event-sourced architecture provides unique time-travel capabilities while maintaining ACID properties.
+DriftDB has evolved from a basic time-travel database to a significantly improved alpha system with enhanced SQL support. The implementation prioritizes correctness and PostgreSQL compatibility for development/testing use. The event-sourced architecture provides unique time-travel capabilities while maintaining ACID properties for basic operations.