添加自定义提取的提示

performance/Performance.Services/CustomExtractService.cs

@@ -236,6 +236,8 @@ private void WriteDataToFile(int userId, per_allot allot, List<cust_script> scri
                     }
                 }
             }
+
+            _notificationQueue.Send(new Notification(allot.ID, "ReceiveMessage", new TextContent($"数据已提取完成，正在写入文件，文件稍后将自动下载...")));
         }
 
         /// <summary>