ci: Add Python 3.14 to CI

[matthewfeickert]

• Set Python 3.14 as the newest version of Python to test against.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.51%. Comparing base (606c561) to head (d9d7ee2).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #202   +/-   ##
=======================================
  Coverage   72.51%   72.51%           
=======================================
  Files           4        4           
  Lines         131      131           
=======================================
  Hits           95       95           
  Misses         36       36           

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[Copilot]

Pull request overview

This PR updates the CI workflow to use Python 3.14, replacing Python 3.13 in the test matrix and changing the distribution build step from Python 3.10 to 3.14.

Key Changes:

• Replaces Python 3.13 with 3.14 in the CI test matrix
• Updates the distribution build job to use Python 3.14 instead of 3.10

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