eliminates race conditions

Author: Andrei Neagu

packages/service-library/src/servicelib/deferred_tasks/_deferred_manager.py

@@ -305,10 +305,11 @@ async def __start(
             state=TaskState.SCHEDULED,
         )
 
+        await self._task_tracker.save(task_uid, task_schedule)
+
         with log_catch(_logger, reraise=False):
             await subclass.on_created(task_uid, deferred_context)
 
-        await self._task_tracker.save(task_uid, task_schedule)
         _logger.debug("Scheduled task '%s' with entry: %s", task_uid, task_schedule)
         await self.__publish_to_queue(task_uid, _FastStreamRabbitQueue.SCHEDULED)