update requirements txt 4

requirements.txt

@@ -2,7 +2,7 @@
 fastapi==0.116.2
 uvicorn[standard]==0.35.0
 
-# LangChain & LangGraph - USING YOUR WORKING VERSIONS
+# LangChain & LangGraph - Compatible versions
 langgraph==0.3.18
 langchain==0.3.27
 langchain-community==0.3.20
@@ -13,23 +13,24 @@ langgraph-checkpoint-postgres==2.0.23
 
 # Database
 psycopg2-binary==2.9.10
+pymongo==4.10.0
 python-dotenv==1.0.1
 
 # AI/ML
 openai==1.68.2
 anthropic==0.49.0
-sentence-transformers==2.2.2
+sentence-transformers==3.0.0
 
 # Document Processing
 pypdf==5.4.0
 
 # Vector Store
-chromadb==0.4.22
+chromadb==0.5.20
 
-# Data Processing
-numpy==1.24.3
-pandas==2.1.4
-tiktoken==0.5.2
+# Data Processing - UPDATED
+numpy==1.26.4
+pandas==2.2.0
+tiktoken==0.8.0
 
 # HTTP
 requests==2.32.3
@@ -38,9 +39,6 @@ requests==2.32.3
 pydantic==2.11.9
 pydantic-settings==2.6.0
 
-# MongoDB
-pymongo==4.10.0
-
 # Utilities
 rich==14.1.0
 lxml==5.3.1