docs(12-03): update CHANGELOG.md with v1.0.1 release notes

- Document all features from phases 1-12
- Add AI-powered capabilities (sprint, roadmap, issue intelligence)
- Add PRD and task analysis features
- Document sub-issue and project lifecycle tools
- Document resilience patterns and observability
- Document MCP SDK upgrade and service decomposition
- Document test suite stabilization and E2E fixes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kunwarVivek

CHANGELOG.md

@@ -7,20 +7,48 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+No unreleased changes.
+
+## [1.0.1] - 2026-02-01
+
 ### Added
-- Initial setup for npm package publication
-- Enhanced documentation for public use
-- Publication scripts and workflows
+- AI-powered sprint planning with capacity analysis (AI-09 to AI-12)
+- AI-powered roadmap generation with phase sequencing (AI-13 to AI-16)
+- AI issue intelligence: enrichment, labels, duplicates, related issues (AI-17 to AI-20)
+- PRD confidence scoring and section-level quality metrics (AI-01 to AI-04)
+- Task dependency detection and effort estimation (AI-05 to AI-08)
+- Sub-issue management tools (GHAPI-01 to GHAPI-05)
+- Project status update tools (GHAPI-06 to GHAPI-08)
+- Project template and linking tools (GHAPI-09 to GHAPI-18)
+- Project lifecycle and advanced operations (GHAPI-19 to GHAPI-24)
+- Circuit breaker pattern for AI service resilience (DEBT-21)
+- Health check endpoint for service monitoring (DEBT-22)
+- Request tracing with correlation IDs (DEBT-23)
+- Cache persistence for improved performance (DEBT-24)
+- Graceful degradation when AI unavailable (DEBT-25)
+- Comprehensive tool documentation (119 tools across 17 categories)
+- Configuration guide and troubleshooting documentation
+- Publication scripts and workflows for npm
 
 ### Changed
+- Upgraded MCP SDK from 1.12.0 to 1.25.3 (MCP-01 to MCP-15)
+- Decomposed ProjectManagementService into 6 focused services (DEBT-01 to DEBT-07)
+- All tools now have behavior annotations and output schemas
+- Improved type safety throughout codebase (DEBT-08 to DEBT-13)
+- Enhanced error handling with MCP-compliant error codes
 - Updated package.json for npm publication
   - Added proper author information
   - Fixed repository, homepage, and bugs URLs
   - Added files field to control package contents
-  - Set specific version for @modelcontextprotocol/sdk dependency
   - Added publishConfig for public access
   - Added funding information
 
+### Fixed
+- Test suite stabilization with proper credential guards (DEBT-14 to DEBT-20)
+- Type assertion issues replaced with proper type guards
+- E2E test reliability improvements (PROD-01 to PROD-03)
+- Fixed E2E tool discovery to use MCP SDK properly
+
 ## [0.1.0] - 2025-05-21
 
 ### Added