llama_index==0.10.37 langchain==0.1.20 transformers==4.40.2 langchain_nvidia_ai_endpoints==0.0.16 langchain_core==0.1.52 python-dotenv==1.0.1 fastapi==0.111.0 pydantic==2.7.1 llama-index-embeddings-huggingface==0.2.0 llama-index-llms-langchain==0.1.3