tasks.py: don't call Converter when model response is valid (#406)

* tasks.py: don't call Converter when model response is valid

Try to convert the task output to the expected Pydantic model before sending it to Converter, maybe the model got it right.

src/crewai/task.py

@@ -221,6 +221,16 @@ def _export_output(self, result: str) -> Any:
 
         if self.output_pydantic or self.output_json:
             model = self.output_pydantic or self.output_json
+
+            # try to convert task_output directly to pydantic/json
+            try:
+                exported_result = model.model_validate_json(result)
+                if self.output_json:
+                    return exported_result.model_dump()
+                return exported_result
+            except Exception:
+                pass
+
             llm = self.agent.function_calling_llm or self.agent.llm
 
             if not self._is_gpt(llm):