Shs/prnu ( #885)

[ShannonS00]

Summary

• Adds a new PixelResponseNonUniformity effect in effects/electronics/noise.py that models per-pixel gain
  variation (PRNU) by multiplying each pixel by a (per pixel) gain factor drawn from N(1, prnu_std)
• The gain map is generated once per detector and cached, reflecting that PRNU
  is a fixed physical property of the detector chip
• prnu_std accepts a scalar float or a dict keyed by detector ID, for later implementation of different values per detector type (e.g. H2RG & GeoSnap) in the instrument packages
• Defaults set to prnu_std=0.01 (1%)

[codecov]

Codecov Report

❌ Patch coverage is 17.64706% with 28 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.60%. Comparing base (02976b3) to head (acf6dae).

Files with missing lines	Patch %	Lines
scopesim/effects/electronic/noise.py	17.64%	28 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #886      +/-   ##
==========================================
- Coverage   74.82%   74.60%   -0.22%     
==========================================
  Files          69       69              
  Lines        8869     8903      +34     
==========================================
+ Hits         6636     6642       +6     
- Misses       2233     2261      +28     

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[teutoburg]

Please add:

• A more meaningful title (PR titles are part of the documentation as they become changelog entries)
• Some unit tests to to verify that this is doing what it should (or indeed runs at all)

I'm drafting this in the meantime...

[teutoburg]

Would this fully close your #885?