langchain gradio_pdf chromadb langchain-community sentence_transformers requests==2.28.2 posthog<3.0.0 uvicorn APScheduler black datasets gradio==5.34.1 gradio[oauth] gradio_leaderboard==0.0.13 gradio_client huggingface-hub>=0.18.0 matplotlib numpy pandas python-dateutil tqdm transformers tokenizers>=0.15.0 sentencepiece