[pdmullen]

PR Summary

• Geometry-aware PLM (Mignone 2014) for curvilinear grids; curvilinear THINC changes
• Face pressure flux-corrected for the geometric source
• Jacobi: red-black ordering, angular sweep, conservative feedback
• Jacobi: step-rule convergence, extrapolated initial guess

PR Checklist

• Adds a test for any bugs fixed. Adds tests for new features.
• Format your changes by using the scripts/format.sh command or by using @par-hermes format
• Document any new features, update documentation for changes made.
• Make sure the copyright notice on any files you modified is up to date.
• LANL employees: make sure tests pass both on the github CI and on the re-git CI
• If ML was used, make sure to add a disclaimer at the top of a file indicating ML was used to assist in generating the file.
• If Agentic AI was used, have the AI generate a "proposed changes" markdown file and store it in the plan_histories folder, with a filename the same as the MR number.

If preparing for a new release, in addition please check the following:

• Update the version in cmake.