Revert "Bump the pip group across 1 directory with 3 updates"

Author: ThomasJButler

backend/requirements.txt

@@ -2,13 +2,13 @@ fastapi==0.104.1
 uvicorn[standard]==0.24.0
 langchain==0.2.16
 langchain-openai==0.1.25
-langchain-community==0.3.27
+langchain-community==0.2.17
 chromadb==0.4.24
 python-dotenv==1.0.0
 pydantic==2.11.7
 pandas==2.1.4
 numpy==1.26.2
-python-multipart==0.0.18
-requests==2.32.4
+python-multipart==0.0.6
+requests==2.31.0
 aiofiles==24.1.0
 supabase==2.18.1