[Refactor] code

[kozistr]

Problem (Why?)

refactor BaseOptimizer

Solution (What/How?)

• debias
• debias_adam

Other changes (bug fixes, small refactors)

N/A

Notes

N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (474510f) to head (59e3ec3).
Report is 121 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #261   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           90        90           
  Lines         6860      6808   -52     
=========================================
- Hits          6860      6808   -52     

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