【bug】backend事件查询bug修复

[xuezechao1]

【修复issue】#1099

【修改内容】

• 修改事件查询后按时间排序
• 定时任务报错修复
• 查询事件数量统计错误修复

【用例描述】不需修改用例

【自测情况】1、本地静态检查通过

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.02 🎉

Comparison is base (b586ff2) 41.63% compared to head (7c04a47) 41.66%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #1154      +/-   ##
=============================================
+ Coverage      41.63%   41.66%   +0.02%     
  Complexity      3183     3183              
=============================================
  Files            808      808              
  Lines          17791    17780      -11     
  Branches        1943     1940       -3     
=============================================
  Hits            7408     7408              
+ Misses          9443     9432      -11     
  Partials         940      940              

Flag	Coverage Δ
unittests	41.66% <0.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...d/sermant/backend/dao/memory/MemoryClientImpl.java	0.00% <0.00%> (ø)
...ud/sermant/backend/dao/redis/EventDaoForRedis.java	0.00% <ø> (ø)
...oud/sermant/backend/dao/redis/RedisClientImpl.java	0.00% <0.00%> (ø)
...d/sermant/backend/timer/DeleteTimeoutDataTask.java	0.00% <ø> (ø)
.../com/huaweicloud/sermant/backend/util/DbUtils.java	0.00% <0.00%> (ø)
...rmant/backend/webhook/feishu/FeiShuHookClient.java	0.00% <0.00%> (ø)

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[robotLJW]

/lgtm