update requirement.txt

requirements.txt

@@ -1,21 +1,21 @@
 # Python dependencies from backend
-fastapi==0.109.0
-uvicorn[standard]==0.27.0
-langgraph==0.0.20
-langchain==0.1.0
-langchain-groq==0.0.1
-langchain-community==0.0.13
-sqlalchemy==2.0.25
-pandas==2.1.4
-numpy==1.26.3
-scipy==1.11.4
-statsmodels==0.14.1
-matplotlib==3.8.2
-reportlab==4.0.8
-python-dotenv==1.0.0
-pydantic==2.5.3
-requests==2.31.0
-python-multipart==0.0.6
+fastapi
+uvicorn[standard]
+langgraph
+langchain
+langchain-groq
+langchain-community
+sqlalchemy
+pandas
+numpy
+scipy
+statsmodels
+matplotlib
+reportlab
+python-dotenv
+pydantic
+requests
+python-multipart
 
 # Gradio for HF Spaces UI - updated to latest secure version
 gradio==5.8.0