chore(webserver): improve error log for each cron job to make it easi…

[wsxiaoys]

…er to identify the stack trace

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 57.02%. Comparing base (cb9a8a7) to head (681856f).
Report is 1 commits behind head on main.

Files	Patch %	Lines
ee/tabby-webserver/src/cron/db/mod.rs	0.00%	18 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1982      +/-   ##
==========================================
- Coverage   57.07%   57.02%   -0.06%     
==========================================
  Files         136      136              
  Lines       12433    12444      +11     
==========================================
  Hits         7096     7096              
- Misses       5337     5348      +11     

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