* Add EntityManager base class for standardized entity operations
* Update SemanticVersioning to extend EntityManager
* Update EventRecorder to extend EntityManager
* Update PersistentEntitySystem to extend EntityManager
* Update ConceptSystem to extend EntityManager
* Fix entity ID mismatch patterns across all Knowledge Layer components
* Add proper domain ID to Brainy ID mapping
* Replace direct brain.add/find calls with EntityManager methods
* Ensure all entity interfaces extend ManagedEntity
* Add proper metadata fields for querying (eventType, conceptType, entityType)
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>