uvicorn bs4 lxml fastapi loguru chromadb==0.3.29 #chromadb==0.4.0 langchain==0.1.0 sentence_transformers InstructorEmbedding sse_starlette dropbox firebase together python-dotenv pytest pytest-env pydantic==1.10.9 pysqlite3-binary openapi-schema-pydantic markdown google-generativeai lark