fix: 修复执行任务中心报错的问题

apps/ops/tasks.py

@@ -64,7 +64,13 @@ def job_execution_task_activity_callback(self, execution_id, *args, **kwargs):
     activity_callback=job_execution_task_activity_callback
 )
 def run_ops_job_execution(execution_id, **kwargs):
+    with tmp_to_root_org():
         execution = get_object_or_none(JobExecution, id=execution_id)
+
+    if not execution:
+        logger.error("Did not get the execution: {}".format(execution_id))
+        return
+
     try:
         with tmp_to_org(execution.org):
             execution.start()