feat(memory): replace Mem0 with local RAG using SQLite, ChromaDB, and bge-small

pyproject.toml

@@ -5,6 +5,7 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
+    "chromadb>=1.3.5",
     "fastapi>=0.115.12",
     "haystack-ai>=2.12.1",
     "huggingface-hub>=0.30.2",
@@ -12,6 +13,7 @@ dependencies = [
     "milvus-haystack>=0.0.15",
     "pydantic>=2.11.3",
     "pymilvus>=2.5.6",
+    "sentence-transformers>=5.1.2",
     "uvicorn>=0.34.0",
 ]
 [[tool.uv.index]]