refactor(changelog): cleanup and add test cases

[bearomorphism]

Description

Checklist

• I have read the contributing guidelines

Code Changes

• Add test cases to all the changes you introduce
• Run poetry all locally to ensure this change passes linter check and tests
• Manually test the changes:
  • Verify the feature/bug fix works as expected in real-world scenarios
  • Test edge cases and error conditions
  • Ensure backward compatibility is maintained
  • Document any manual testing steps performed
• Update the documentation for the changes

Documentation Changes

• Run poetry doc locally to ensure the documentation pages renders correctly

Expected Behavior

Steps to Test This Pull Request

Additional Context

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.57%. Comparing base (120d514) to head (949b496).
Report is 610 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1425      +/-   ##
==========================================
+ Coverage   97.33%   97.57%   +0.23%     
==========================================
  Files          42       57      +15     
  Lines        2104     2676     +572     
==========================================
+ Hits         2048     2611     +563     
- Misses         56       65       +9     

Flag	Coverage Δ
unittests	97.57% <100.00%> (+0.23%)	⬆️

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