Update requirements.txt

requirements.txt

@@ -1,11 +1,18 @@
 chromadb==0.6.3
 fastapi==0.115.12
 langchain==0.3.23
+langchain-chroma==0.2.3
+langchain-community==0.3.21
+langchain-core==0.3.52
+langchain-huggingface==0.1.2
+langchain-ollama==0.3.2
+langchain-text-splitters==0.3.8
 langsmith==0.3.31
 pydantic==2.11.3
 pypdf==5.4.0
 requests==2.32.3
 sentencepiece==0.2.0
+starlette==0.46.2
 streamlit==1.44.1
 torch==2.6.0
 transformers==4.51.3