feat: final answer generation

app.py

@@ -20,7 +20,10 @@ class BasicAgent:
         print("BasicAgent initialized.")
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
-        answer = self.agent.chat(question)
+        answer = self.agent.chat(
+            question, 
+            only_final_answer=True
+        )
         print(f"Agent returning answer: {answer}")
         return answer