docs: update CHANGELOG with LSP server and PR #129 changes

[ajitpratap0]

Summary

Updates CHANGELOG.md to document all features from PR #129.

Added Documentation

• Language Server Protocol (LSP) - Full feature list for CLI-009
• MATERIALIZED CTE Support - Phase 2.6 feature
• Comprehensive Metrics System - Thread-safe performance monitoring
• AST Pool Architecture improvements - Iterative cleanup, new expression pools
• Bug Fixes - Type assertions, race conditions, LSP hover

Related

• Closes after PR feat: code review fixes and LSP enhancements #129 merge
• Documents features for issue CLI-009: Language Server Protocol (LSP) Implementation #76 (LSP Server)
• Updates dependency status for issue INT-001: VSCode Extension #72 (VSCode Extension)

Test plan

• No code changes, documentation only

🤖 Generated with Claude Code

[claude]

Claude finished @ajitpratap0's task —— View job

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PR Review: Documentation Updates

I've completed my review of this documentation-only PR. Here's my comprehensive analysis:

Todo List:

• Read and analyze the CHANGELOG.md changes
• Verify documentation formatting and structure
• Check consistency with existing documentation patterns
• Provide comprehensive review feedback
• Submit final review

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✅ Overall Assessment: APPROVED

This is a well-structured documentation update that follows the project's established patterns and provides comprehensive coverage of the new features from PR #129.

📋 Review Summary

What this PR does well:

1. Follows Keep a Changelog Format: Properly organizes changes under Added, Improved, and Fixed sections as per the project's Keep a Changelog standard.

2. Consistent Formatting: Uses the same markdown formatting patterns as existing entries (bold feature names, detailed bullet points, technical specifications).

3. Comprehensive LSP Documentation: Excellent detail on the LSP server implementation:

   • Lists all 8 LSP protocol methods implemented
   • Includes specific metrics (60+ keywords, 100+ keywords, 20+ snippets, 20+ SQL functions)
   • Documents performance limits (100 req/sec rate limiting)
   • Covers security features (content size limits, malformed request handling)

4. Technical Accuracy: Cross-referenced with /home/runner/work/GoSQLX/GoSQLX/CLAUDE.md:31 and /home/runner/work/GoSQLX/GoSQLX/README.md:175 - all LSP feature documentation aligns perfectly with existing project documentation.

5. Proper Phase Documentation: Correctly identifies "Phase 2.6" for MATERIALIZED CTE support, following the established phase numbering system.

Areas of excellence:

• Metrics System Documentation: Provides clear breakdown of thread-safe performance monitoring with specific component coverage (Parser, AST pool, Tokenizer pool)
• Bug Fix Documentation: Specific and actionable descriptions (e.g., "LSP hover returning nil instead of empty response")
• Architecture Improvements: Well-documented AST pool enhancements with technical details (MaxCleanupDepth, MaxWorkQueueSize, 8 new expression pools)

🔍 Security Assessment

• ✅ No Security Concerns: This is documentation-only with no code changes
• ✅ No Malicious Content: All content is legitimate project documentation

🎯 Performance Considerations

• ✅ No Performance Impact: Documentation changes have zero performance impact
• ✅ Documents Performance Features: Actually documents performance improvements (metrics system, pool architecture)

📊 Test Coverage

• ✅ Documentation Only: No code changes require test coverage
• ✅ Self-Documented: PR correctly states "No code changes, documentation only" in test plan

🚀 Code Quality

• ✅ Excellent Documentation Quality: Clear, comprehensive, and well-structured
• ✅ Follows Project Standards: Adheres to the project's documentation guidelines from CLAUDE.md
• ✅ Version Management Compliance: Properly marks features as "[Unreleased]" following the release workflow guidelines

📝 Minor Suggestions (Optional improvements):

1. Consider grouping related LSP features: The LSP features could potentially be grouped by functionality (e.g., "Document synchronization", "IntelliSense features", "Validation features") for better readability.

2. Cross-reference issue numbers: Could add references to the original issue numbers (e.g., issue CLI-009: Language Server Protocol (LSP) Implementation #76 for LSP Server) as mentioned in the PR description.

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Recommendation: ✅ APPROVE & MERGE

This PR successfully documents all the features from PR #129 in a comprehensive, well-formatted manner that follows the project's established documentation standards. It provides excellent detail for users and developers to understand the new LSP capabilities and other enhancements.