add error handling method

[phnx47]

add OnPushError error handling method

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.29%. Comparing base (4856754) to head (ebb940f).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/MetricPusherHostedService.cs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
+ Coverage   92.00%   96.29%   +4.29%     
==========================================
  Files           3        3              
  Lines          25       27       +2     
  Branches        3        3              
==========================================
+ Hits           23       26       +3     
+ Misses          2        1       -1     

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