verify PrimaryKey equals method

[sullis]

use equalsverifier library to verify PrimaryKey 'equals' method

https://jqno.nl/equalsverifier/

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.66%. Comparing base (59551e4) to head (01d6c6b).
Report is 71 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12574      +/-   ##
============================================
- Coverage     61.75%   61.66%   -0.09%     
- Complexity      207     1152     +945     
============================================
  Files          2436     2451      +15     
  Lines        133233   133730     +497     
  Branches      20636    20704      +68     
============================================
+ Hits          82274    82467     +193     
- Misses        44911    45151     +240     
- Partials       6048     6112      +64     

Flag	Coverage Δ
custom-integration1	<0.01% <ø> (-0.01%)	⬇️
integration	<0.01% <ø> (-0.01%)	⬇️
integration1	?
integration2	?
java-11	61.66% <ø> (-0.05%)	⬇️
java-21	?
skip-bytebuffers-false	61.66% <ø> (-0.09%)	⬇️
skip-bytebuffers-true	?
temurin	61.66% <ø> (-0.09%)	⬇️
unittests	61.66% <ø> (-0.09%)	⬇️
unittests1	46.86% <ø> (-0.03%)	⬇️
unittests2	27.64% <ø> (-0.09%)	⬇️

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[sullis]

ready to merge