Skip METISSE mass bounds check for massless objects

[d-maclean]

Currently, Evolve.evolve will throw an exception if you pass an initial binary table with mass_1/mass_2 = 0 , because we have no zero-mass tracks. I added some logic to skip this if the mass provided is exactly zero.

[github-actions]

🚨 CMC review requested

This pull request modifies one or more of:

• src/cosmic/evolve.py
• src/cosmic/data/cosmic-settings.json (only flagged when category: "bse" key-count changes)

Trigger: evolve file changed, probably needs CMC review

A CMC developer should review this PR to ensure corresponding changes are propagated upstream as needed.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.31%. Comparing base (8772c07) to head (a3d052b).
⚠️ Report is 162 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/cosmic/evolve.py	0.00%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #789       +/-   ##
============================================
- Coverage    86.91%   76.31%   -10.60%     
============================================
  Files           40       58       +18     
  Lines        25542    28096     +2554     
  Branches         0      919      +919     
============================================
- Hits         22198    21440      -758     
- Misses        3344     6352     +3008     
- Partials         0      304      +304     

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[katiebreivik]

👍