🎨 Constraint function plots in plot_proc

[chris-ashe]

This pull request enhances the post-optimization reporting for constraint handling in process/scan.py. The main improvements involve adding more detailed output for both equality and inequality constraints, including physical values, units, symbols, and bounds, which should make debugging and analysis easier.

Enhanced constraint reporting:

• Added output of residuals, constraint values, and units for equality constraints using process_output.ovarre, improving the detail of post-optimization logs.
• For inequality constraints, now calculate and output the physical value, symbol, units, and physical bound for each constraint, and include these in the output file for better traceability.

Output formatting improvements:

• Updated the table headers for inequality constraint reporting to include "Physical constraint bound" for clearer presentation of results.

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Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 1.82927% with 161 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.07%. Comparing base (5ea7543) to head (fb0c502).
⚠️ Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
process/io/plot_proc.py	1.97%	149 Missing ⚠️
process/scan.py	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4049      +/-   ##
==========================================
+ Coverage   46.49%   47.07%   +0.57%     
==========================================
  Files         123      123              
  Lines       28777    29779    +1002     
==========================================
+ Hits        13381    14019     +638     
- Misses      15396    15760     +364     

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[jonmaddock]

@chris-ashe could you add an image of the new output here?

[chris-ashe]

@chris-ashe could you add an image of the new output here?

Have added to main PR text now

[jonmaddock]

Great to have this working, such an improvement to our visualisation! Main points are about calculating stuff that has either been calculated already (I think) or should have been, e.g. normalisation of constraint/bound values.

[jonmaddock]

This looks fantastic now!

[timothy-nunn]

I'm not sure the equality constraint plot is doing anything for me. Its quite hard to meaningfully plot the residuals of these constraints especially given the different orders of magnitude. Would this be better as just a table?

The inequality bar chart should show margin so the bars should come from the right for $\leq$ constraints.

[timothy-nunn]

@chris-ashe when you have actioned all of Jon's comments can you please re-request his review

[jonmaddock]

Happy with changes so far, but couple of comments still need resolving.