Add all documentation subdirectories to the curated markdown linting targets, replacing the previous exclusion-based approach with comprehensive coverage. Update validation to check for required README files across all hubs and verify priority documentation metadata markers. Implement lazy loading for optional dependencies (numpy, redis, bcrypt, jwt, websockets) in agent-coordinator and related modules to improve startup
- Simplify root README to focus on implemented features and quick navigation
- Replace verbose project structure with concise feature list
- Remove recent achievements section (moved to release notes)
- Add direct links to master index and main documentation
- Update MASTER_INDEX.md to focus on documentation catalog
- Remove project completion status (moved to release notes)
- Remove learning path sections (kept in individual path
