fix: update state assignment to use enum values in ToolRecord updates

Author: liuruibin

apps/application/flow/step_node/tool_lib_node/impl/base_tool_lib_node.py

@@ -265,7 +265,7 @@ def tool_exec_record(self, tool_lib, all_params):
             result = function_executor.exec_code(tool_lib.code, all_params)
             result_dict = _get_result_detail(result)
             QuerySet(ToolRecord).filter(id=task_record_id).update(
-                state=State.SUCCESS,
+                state=State.SUCCESS.value,
                 run_time=time.time() - start_time,
                 meta={'input': all_params, 'output': result_dict}
             )
@@ -274,7 +274,7 @@ def tool_exec_record(self, tool_lib, all_params):
         except Exception as e:
             maxkb_logger.error(f"Tool execution error: {traceback.format_exc()}")
             QuerySet(ToolRecord).filter(id=task_record_id).update(
-                state=State.FAILURE,
+                state=State.FAILURE.value,
                 run_time=time.time() - start_time
             )