ci: CuPy 14 + Python 3.14

[flying-sheep]

• Closes #
• Tests added
• Release note not necessary because: CI

gets rid of yq and just uses the pinned version of some package that does the exact thing we want.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.34%. Comparing base (5b1a8c5) to head (57172e6).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2352   +/-   ##
=======================================
  Coverage   87.34%   87.34%           
=======================================
  Files          49       49           
  Lines        7775     7775           
=======================================
  Hits         6791     6791           
  Misses        984      984           

[flying-sheep]

all python-version does is setting UV_PYTHON so we can just do that manually after installing uv

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 0.12.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 c67c66d578c77b2d4c5a9c48c4aa7d808d8304a3

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #2352: ci: CuPy 14 + Python 3.14'

4. Push to a named branch:

git push YOURFORK 0.12.x:auto-backport-of-pr-2352-on-0.12.x

5. Create a PR against branch 0.12.x, I would have named this PR:

"Backport PR #2352 on branch 0.12.x (ci: CuPy 14 + Python 3.14)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.