Update requirements.txt

requirements.txt

@@ -1,13 +1,16 @@
+# requirements.txt
 streamlit==1.32.0
 selenium==4.20.0
 transformers==4.44.2
 sentence-transformers==3.1.1
 huggingface_hub==0.25.1
-langchain==0.3.27
-langchain-community==0.0.29
 faiss-cpu==1.7.4
 torch==2.2.0
 psutil==5.9.8
 accelerate==0.30.0
 protobuf==3.20.3
-langchain-core==0.3.75  # Updated to a valid version
+
+# LangChain ecosystem - pinned for Python 3.10
+langchain==0.2.3
+langchain-community==0.2.3
+langchain-core==0.2.3