Save original WCS, fix starfield scale and distortion

[jmbhughes]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.

Project coverage is 46.73%. Comparing base (278e782) to head (782452e).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
simpunch/level1.py	20.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #89      +/-   ##
==========================================
- Coverage   47.05%   46.73%   -0.33%     
==========================================
  Files          10       10              
  Lines         595      597       +2     
==========================================
- Hits          280      279       -1     
- Misses        315      318       +3     

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