Merge master into openapi

[bkoelman]

Merges the master branch into openapi, which contains stricter rules for code quality.
Aside from the merge, this PR adds extra commits to make the OpenAPI code compliant.

QUALITY CHECKLIST

• Changes implemented in code
• Complies with our contributing guidelines
• Adapted tests
• N/A: Documentation updated

[codecov]

Codecov Report

Attention: Patch coverage is 87.12121% with 17 lines in your changes missing coverage. Please review.

Project coverage is 90.54%. Comparing base (be9165b) to head (abfc8c8).

Files with missing lines	Patch %	Lines
...les/DapperExample/Repositories/DapperRepository.cs	30.00%	13 Missing and 1 partial ⚠️
...ameworkExample/Services/InMemoryResourceService.cs	66.66%	0 Missing and 2 partials ⚠️
...TranslationToSql/DataModel/BaseDataModelService.cs	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           openapi    #1615      +/-   ##
===========================================
- Coverage    90.61%   90.54%   -0.08%     
===========================================
  Files          455      455              
  Lines        13603    13723     +120     
  Branches      2104     2116      +12     
===========================================
+ Hits         12326    12425      +99     
- Misses         872      881       +9     
- Partials       405      417      +12     

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