fix: add cwv biased downsampling, bundle variants

[maxakuru]

todo:

• pass variant to daily cdn reqs for monthly bundles
  • downsample on 2nd round if bundles are too large?
• tests

[github-actions]

This PR will trigger a patch release when merged.

[codecov]

Codecov Report

Attention: Patch coverage is 78.37838% with 16 lines in your changes missing coverage. Please review.

Project coverage is 89.68%. Comparing base (6e6665b) to head (a3a04e2).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/api/bundles.js	78.37%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #148      +/-   ##
==========================================
- Coverage   89.96%   89.68%   -0.28%     
==========================================
  Files          18       18              
  Lines        3597     3656      +59     
==========================================
+ Hits         3236     3279      +43     
- Misses        361      377      +16     

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