New MCP tools:
- project_lock: Lock a project for exclusive session access
- project_unlock: Release a project lock
- project_lock_status: Check lock status for project(s)
Features:
- Automatic lock expiration (default 2h)
- Session ownership verification
- Force unlock option for emergencies
- Lock extension on re-lock by same session
Migration 004: project_locks table with expiry tracking
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
