fix: token is not logging of question classifier node (#3249)

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

 from core.prompt.simple_prompt_transform import ModelMode
 from core.prompt.utils.prompt_message_util import PromptMessageUtil
 from core.workflow.entities.base_node_data_entities import BaseNodeData
-from core.workflow.entities.node_entities import NodeRunResult, NodeType
+from core.workflow.entities.node_entities import NodeRunMetadataKey, NodeRunResult, NodeType
 from core.workflow.entities.variable_pool import VariablePool
 from core.workflow.nodes.llm.llm_node import LLMNode
 from core.workflow.nodes.question_classifier.entities import QuestionClassifierNodeData
                 inputs=variables,
                 process_data=process_data,
                 outputs=outputs,
-                edge_source_handle=classes_map.get(categories[0], None)
+                edge_source_handle=classes_map.get(categories[0], None),
+                metadata={
+                    NodeRunMetadataKey.TOTAL_TOKENS: usage.total_tokens,
+                    NodeRunMetadataKey.TOTAL_PRICE: usage.total_price,
+                    NodeRunMetadataKey.CURRENCY: usage.currency
+                }
             )
 
         except ValueError as e:
             return NodeRunResult(
                 status=WorkflowNodeExecutionStatus.FAILED,
                 inputs=variables,
-                error=str(e)
+                error=str(e),
+                metadata={
+                    NodeRunMetadataKey.TOTAL_TOKENS: usage.total_tokens,
+                    NodeRunMetadataKey.TOTAL_PRICE: usage.total_price,
+                    NodeRunMetadataKey.CURRENCY: usage.currency
+                }
             )
 
     @classmethod