Error slog attribute

[veqryn]

• Add an error slog attribute.
• Fix scorecard github action.
• Update readme.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.86%. Comparing base (47ec50a) to head (d4bc074).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   93.80%   93.86%   +0.05%     
==========================================
  Files           6        6              
  Lines         210      212       +2     
==========================================
+ Hits          197      199       +2     
  Misses          9        9              
  Partials        4        4              

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