refactor shared encoder layers

[jeff-regier]

No description provided.

[codecov]

Codecov Report

Merging #684 (4556bbf) into master (a3ee265) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #684      +/-   ##
==========================================
+ Coverage   87.17%   87.19%   +0.01%     
==========================================
  Files          25       26       +1     
  Lines        3728     3732       +4     
==========================================
+ Hits         3250     3254       +4     
  Misses        478      478              

Flag	Coverage Δ
unittests	87.19% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
bliss/models/binary.py	99.22% <100.00%> (ø)
bliss/models/detection_encoder.py	95.90% <100.00%> (-0.78%)	⬇️
bliss/models/encoder_layers.py	100.00% <100.00%> (ø)
bliss/models/galsim_encoder.py	21.59% <100.00%> (ø)
bliss/models/lens_encoder.py	81.00% <100.00%> (ø)
bliss/models/lensing_binary_encoder.py	76.37% <100.00%> (ø)

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