♻️ 🧲 Refactor croco 2

[chris-ashe]

Description

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 23.68421% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.03%. Comparing base (b709cbd) to head (df5626e).

Files with missing lines	Patch %	Lines
process/superconducting_tf_coil.py	23.68%	29 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3909      +/-   ##
==========================================
- Coverage   46.06%   46.03%   -0.04%     
==========================================
  Files         123      123              
  Lines       28467    28486      +19     
==========================================
  Hits        13114    13114              
- Misses      15353    15372      +19     

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