Enhancement: Use attributes

[localheinz]

This pull request

• uses attributes instead of annotations

Follows #1234.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e60f5d2) 99.28% compared to head (052cd66) 99.28%.

❗ Current head 052cd66 differs from pull request most recent head 323028d. Consider uploading reports for the commit 323028d to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1235   +/-   ##
=========================================
  Coverage     99.28%   99.28%           
  Complexity      105      105           
=========================================
  Files            25       25           
  Lines           420      420           
=========================================
  Hits            417      417           
  Misses            3        3           

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