Refactor particle_boundary_size and relax CI test failure behaviour

[derollins]

Refactors the particle_boundary_size analysis for clearer structure and more robust handling of timestamps and missing detections, and updates the CI workflow to run the full test suite for better diagnostics.

[codecov]

Codecov Report

❌ Patch coverage is 40.62500% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.15%. Comparing base (0a645df) to head (63364e3).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...laynano_plugins/analysis/particle_boundary_size.py	40.62%	16 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #3      +/-   ##
==========================================
- Coverage   64.72%   63.15%   -1.57%     
==========================================
  Files           5        5              
  Lines         360      380      +20     
  Branches       79       82       +3     
==========================================
+ Hits          233      240       +7     
- Misses         81       93      +12     
- Partials       46       47       +1     

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