Update requirements.txt

requirements.txt

@@ -41,6 +41,7 @@ langchain-core==0.3.1
 langchain-openai==0.2.0
 langchain-qdrant==0.1.4
 langchain-text-splitters==0.3.0
+langgraph
 langsmith==0.1.121
 Lazify==0.4.0
 marshmallow==3.22.0
@@ -82,6 +83,7 @@ sniffio==1.3.1
 SQLAlchemy==2.0.35
 starlette==0.27.0
 syncer==2.0.3
+tavily-python
 tenacity==8.5.0
 tiktoken==0.7.0
 tomli==2.0.1