Track the runtime of PROCESS regression tests

[timothy-nunn]

There has been some desire to track the runtime of PROCESS so we can reason about the speed impact of pull requests. Obviously, this tracking won't be perfect and we expect reasonable fluctuations depending on the GitHub runner, the load of the runner, and other random factors. However, it will shows us the trend and will be able to flag any drastic changes.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 33.33333% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.49%. Comparing base (e827793) to head (b56e6ac).

Files with missing lines	Patch %	Lines
process/scan.py	14.28%	6 Missing ⚠️
process/caller.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4092      +/-   ##
==========================================
- Coverage   46.49%   46.49%   -0.01%     
==========================================
  Files         124      124              
  Lines       28955    28961       +6     
==========================================
+ Hits        13464    13465       +1     
- Misses      15491    15496       +5     

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