JP-3908: Incorporate stfitsdiff into regression tests

[penaguerrero]

Resolves JP-3908

This PR implements STFITSDiff instead of astropy.FITSDiff to show our ad hoc reports.

Tasks

• If you have a specific reviewer in mind, tag them.
• add a build milestone, i.e. Build 12.0 (use the latest build if not sure)
• Does this PR change user-facing code / API? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see changelog readme for instructions)
  • update or add relevant tests
  • update relevant docstrings and / or docs/ page
  • start a regression test and include a link to the running job (click here for instructions)
    • Do truth files need to be updated ("okified")?
      • after the reviewer has approved these changes, run okify_regtests to update the truth files
• if a JIRA ticket exists, make sure it is resolved properly

[codecov]

Codecov Report

❌ Patch coverage is 1.69492% with 58 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.85%. Comparing base (7ec57a3) to head (4e3e5eb).
⚠️ Report is 666 commits behind head on main.

Files with missing lines	Patch %	Lines
jwst/regtest/st_fitsdiff.py	0.00%	58 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9414      +/-   ##
==========================================
- Coverage   77.93%   77.85%   -0.08%     
==========================================
  Files         362      362              
  Lines       36252    36288      +36     
==========================================
  Hits        28253    28253              
- Misses       7999     8035      +36     

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[penaguerrero]

reg test running: https://github.com/spacetelescope/RegressionTests/actions/runs/14736185730

[emolter]

Looks good to me. I don't see any reason why we shouldn't just update all of these at once as you suggest, IMO the new version is strictly better (or will be once any remaining kinks are ironed out).

[melanieclarke]

@penaguerrero - now that the table diffs are merged, can you please run regression tests again? Then I think we should be okay to get this merged too.

[penaguerrero]

new regtests running https://github.com/spacetelescope/RegressionTests/actions/runs/14844251987

[melanieclarke]

Looks like regtests caught a problem with the table reports we overlooked in the last PR, for non-float data. I'm going to mark this as changes-requested until we get that fixed.

[penaguerrero]

new regrets run: https://github.com/spacetelescope/RegressionTests/actions/runs/14871485775/job/41760709704

[melanieclarke]

Thanks for the fixes! I think we're ready to give this a try.