fastapi==0.104.1 uvicorn[standard]==0.24.0 python-multipart==0.0.6 pydantic==2.6.4 langchain==0.1.0 langchain-community==0.0.10 langchain-openai==0.0.2 chromadb==0.4.22 posthog==3.0.1 accelerate==1.8.1 transformers==4.53.1 sentence-transformers==5.0.0 huggingface-hub==0.16.4 PyPDF2==3.0.1 python-dotenv==1.0.0 httpx==0.25.2