- Fixed circular import in chromadb by using lazy imports in
ag_engine.py.
- Moved RAG engine initialization to background threads in AppController to avoid blocking UI.
- Added _rag_engine_lock to prevent race conditions during engine re-initialization.
- Updated Gemini embedding model to gemini-embedding-001 (available) from ext-embedding-004 (not found).
- Fixed _rebuild_rag_index to use fresh
ag_engine instance from self in every iteration.
- Optimized est_rag_phase4_final_verify.py and est_rag_phase4_stress.py to wait for RAG sync before continuing.
- Added dummy embedding fallback in LocalEmbeddingProvider if sentence-transformers fails to load.
ed