Add debug object tracker (stream only)

[mtfriesen]

Description

Describe the purpose of and changes within this Pull Request.

Extend #5598 by rewriting commit authorship (to allow @anrossi to approve this PR) and implementing the suggested refactorings.

Testing

Do any existing tests cover this change? Are new tests needed?

Builds locally, CI.

Documentation

Is there any documentation impact for this change?

N/A.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.88%. Comparing base (9117f56) to head (44f6092).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5703      +/-   ##
==========================================
- Coverage   86.20%   85.88%   -0.33%     
==========================================
  Files          60       60              
  Lines       18663    18691      +28     
==========================================
- Hits        16089    16052      -37     
- Misses       2574     2639      +65     

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