Update backend/requirements.txt

backend/requirements.txt

@@ -1,10 +1,21 @@
-fastapi
-uvicorn[standard]
-pydantic
-openai>=1.0.0
-httpx
-aiohttp
-GitPython
-sentence-transformers
-faiss-cpu
-numpy
+fastapi==0.104.1
+uvicorn[standard]==0.24.0
+langchain==0.1.0
+langchain-community==0.0.10
+openai==1.6.1
+groq==0.3.0
+sentence-transformers>=2.7.0
+faiss-cpu==1.7.4
+chromadb==0.4.18
+tiktoken==0.5.2
+tree-sitter==0.20.4
+GitPython==3.1.40
+python-dotenv==1.0.0
+pydantic==2.5.2
+requests==2.31.0
+aiohttp==3.9.1
+celery==5.3.6
+redis==5.0.1
+docker==7.0.0
+httpx>=0.27.0
+huggingface-hub>=0.25.0