Bring codeclimate up to A

[arjunsavel]

Want to move from B-->A!

[codecov-commenter]

Codecov Report

Attention: 43 lines in your changes are missing coverage. Please review.

Comparison is base (b417a6e) 64.52% compared to head (00d9230) 61.75%.
Report is 41 commits behind head on main.

Files	Patch %	Lines
src/cortecs/fit/metrics.py	13.04%	40 Missing ⚠️
src/cortecs/opac/io.py	85.71%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #4      +/-   ##
==========================================
- Coverage   64.52%   61.75%   -2.77%     
==========================================
  Files          17       17              
  Lines         761      821      +60     
==========================================
+ Hits          491      507      +16     
- Misses        270      314      +44     

Flag	Coverage Δ
unittests	61.75% <35.82%> (-2.77%)	⬇️

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