Enhance logging in AgentNode's __call__ method in graph.py to track state before and after processing, including detailed information about messages, question, and answer.

graph.py

@@ -64,11 +64,30 @@ class AgentNode:
 
     def __call__(self, state: AgentState) -> AgentState:
         try:
+            # Log the current state before processing
+            logger.info("Current state before processing:")
+            logger.info(f"Messages: {state['messages']}")
+            logger.info(f"Question: {state['question']}")
+            logger.info(f"Answer: {state['answer']}")
+            
             # Process the question through the agent
+            logger.info("Calling agent.run()...")
             result = self.agent.run(state["question"])
             
+            # Log the result details
+            logger.info("Agent run completed:")
+            logger.info(f"Result type: {type(result)}")
+            logger.info(f"Result value: {result}")
+            
             # Update the state with the answer
             state["answer"] = result
+            
+            # Log the updated state
+            logger.info("Updated state after processing:")
+            logger.info(f"Messages: {state['messages']}")
+            logger.info(f"Question: {state['question']}")
+            logger.info(f"Answer: {state['answer']}")
+            
             return state
             
         except Exception as e: