fix(langfuse): qusetion classify node can't see cost in langfuse (#17982)

api/core/workflow/nodes/parameter_extractor/parameter_extractor_node.py

@@ -186,6 +186,8 @@ class ParameterExtractorNode(LLMNode):
             "usage": None,
             "function": {} if not prompt_message_tools else jsonable_encoder(prompt_message_tools[0]),
             "tool_call": None,
+            "model_provider": model_config.provider,
+            "model_name": model_config.model,
         }
 
         try:

api/core/workflow/nodes/question_classifier/question_classifier_node.py

@@ -130,6 +130,8 @@ class QuestionClassifierNode(LLMNode):
                 ),
                 "usage": jsonable_encoder(usage),
                 "finish_reason": finish_reason,
+                "model_provider": model_config.provider,
+                "model_name": model_config.model,
             }
             outputs = {"class_name": category_name, "class_id": category_id}