fix(defaults): add non-capitalized default constants back and deprecated warning

[bearomorphism]

relates: #1446

Description

Related commit: 94c02b3#diff-c951de16d627d82e01eb3ce8d7c4f0b28973ffe147520620762e7140ede2dd80

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 97.63%. Comparing base (120d514) to head (a1c3881).
Report is 626 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1447      +/-   ##
==========================================
+ Coverage   97.33%   97.63%   +0.29%     
==========================================
  Files          42       57      +15     
  Lines        2104     2661     +557     
==========================================
+ Hits         2048     2598     +550     
- Misses         56       63       +7     

Flag	Coverage Δ
unittests	97.63% <100.00%> (+0.29%)	⬆️

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[Lee-W]

This PR won't close #1446. That one is more like a discussion on how we decide to bump a major verison or not (e.g., some private method can be changed whatever we want, while public ones we might not want it to be that way), Thus changed the description to relates

[Lee-W]

one nits. over all looks good!