asyncio==3.4.3 dotenv==0.9.9 fastapi==0.116.1 httpx==0.28.1 langchain==0.3.27 langchain-core==0.3.72 langchain-pymupdf4llm==0.4.1 langchain-text-splitters==0.3.9 llama-cloud-services==0.6.53 pydantic==2.11.7 python-dotenv==1.1.1 transformers==4.49.0 typing==3.7.4.3 uvicorn==0.35.0 psutil groq rank_bm25 sentence-transformers scikit-learn llama-index PyPDF2 numpy