feat: add langchain-aws dependency for enhanced functionality

Author: wxg0103

pyproject.toml

@@ -29,7 +29,7 @@ dependencies = [
     "langchain-huggingface==0.3.1",
     "langchain-ollama==0.3.10",
     "langchain_core==0.3.80",
-    "langchain-aws>=0.2.28",
+    "langchain-aws==0.2.28",
     "langgraph==0.5.3",
     "torch==2.8.0",
     "sentence-transformers==5.0.0",