Handle uncaught exceptions in coroutine manager and simplify

[MrCreosote]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 12 lines in your changes missing coverage. Please review.

Project coverage is 55.10%. Comparing base (1fb9a4e) to head (6f7d372).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cdmtaskservice/coroutine_manager.py	25.00%	9 Missing ⚠️
cdmtaskservice/app_state.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #139      +/-   ##
==========================================
+ Coverage   55.08%   55.10%   +0.01%     
==========================================
  Files          32       32              
  Lines        1946     1940       -6     
==========================================
- Hits         1072     1069       -3     
+ Misses        874      871       -3     

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[Tianhao-Gu]

LGTM