refactor: extract retry interval into a separate configuration option

[reugn]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 94.67%. Comparing base (50a769b) to head (12a8f89).

Files	Patch %	Lines
quartz/scheduler.go	66.66%	4 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #122      +/-   ##
==========================================
- Coverage   94.68%   94.67%   -0.01%     
==========================================
  Files          19       19              
  Lines         959      958       -1     
==========================================
- Hits          908      907       -1     
  Misses         32       32              
  Partials       19       19              

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