v0.53.1

Fixes

• MCP server startup — Pin @modelcontextprotocol/server to 2.0.0-alpha.2; earlier versions floated to alpha.3, which broke exports and caused crashes on startup.
• Database migrations — Replace blind ALTER migrations with ordered user_version runner for safer schema updates.

Improvements

• GitHub URL validation — Enforce strict URL parsing and whitelist github.com/www.github.com to prevent invalid configurations.
• Internal API contract — Consolidate types and validators into a shared package consumed by MCP, CLI, and web; normalizes error responses to a JSON envelope.
• Deploy orchestration — Extract deployment logic into a tested service for better reliability and maintainability.
• MCP entrypoint — Split monolithic index.ts into per-domain modules with auto-generated tool documentation.
• Release pipeline — Update Docker build and release workflows to account for the contract package; improve release hardening.