Update agent.py

agent.py

@@ -26,6 +26,7 @@ from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_groq import ChatGroq
 from langchain_community.vectorstores import SupabaseVectorStore
 from langchain.tools.retriever import create_retriever_tool
+from langchain_core.rate_limiters import InMemoryRateLimiter
 from supabase.client import Client, create_client
 import time