pin langchain to 0.3.30 matching local

requirements.txt

@@ -2,9 +2,10 @@ fastapi>=0.111.0
 uvicorn>=0.29.0
 pydantic>=2.7.4
 PyJWT>=2.8.0
-langchain>=0.3.0
-langchain-community>=0.3.0
+langchain==0.3.30
+langchain-community==0.3.30
 langchain-huggingface>=0.1.0
+langchain-text-splitters>=0.3.0
 sentence-transformers>=3.0.0
 chromadb>=0.5.0
 rank_bm25>=0.2.2
@@ -12,4 +13,4 @@ supabase>=2.5.0
 plaid-python>=16.0.0
 python-dotenv>=1.0.1
 einops>=0.8.0
-huggingface-hub>=0.24.0
+huggingface-hub>=0.24.0