feat(tests): add experimental free-threaded Python environments to CI

[techouse]

This pull request adds support for experimental Python 3.13t and 3.14t environments to the test matrix, updates the GitHub Actions workflow to handle these as experimental, and updates tox.ini to recognize the new environments. The most important changes are grouped below.

Continuous Integration Workflow Updates:

• The GitHub Actions workflow (.github/workflows/test.yml) now includes jobs for Python 3.13t and 3.14t, marked as experimental. These jobs are labeled accordingly and are allowed to fail without failing the entire workflow. [1] [2]

tox Configuration Updates:

• The tox.ini configuration is updated to add python3.13t and python3.14t to both the envlist and the Python interpreter mapping, enabling local and CI testing in these new environments. [1] [2]

Summary by CodeRabbit

• Chores
  • Updated test workflow with dynamic naming for experimental Python versions
  • Added support for Python 3.13t and 3.14t in testing infrastructure
  • Configured experimental tests to continue on errors

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR introduces experimental Python 3.14-turtle variant support by adding a new matrix entry to the GitHub Actions CI workflow and corresponding tox environment configuration. The test job name and error handling are now dynamic based on experimental status.

Changes

Cohort / File(s)	Summary
CI Workflow Configuration .github/workflows/test.yml	Test job name now conditionally appends "(experimental)" flag when matrix.experimental is true; added continue-on-error: true for experimental matrix runs; introduced new matrix entry for Python 3.14t with experimental flag enabled.
Tox Environment Configuration tox.ini	Added python3.14t environment to envlist and mapped 3.14t to python3.14t in GitHub Actions Python matrix configuration.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~4 minutes

Possibly related PRs

• ⬆️ widen Python support #29: Adds corresponding Python 3.14 entry to CI matrix, aligning with this PR's experimental 3.14t variant introduction.

Suggested labels

python, enhancement

Poem

🐢 A turtle arrives in the CI nest,
With Python 3.14 passing the test,
Experimental flags wave on high,
While errors allowed, workflows won't cry,
Progress marches with scaled delight!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	The title accurately describes the main change: adding experimental free-threaded Python environments to CI, which aligns with the new matrix entry for python3.14t with experimental: true flag.
Description check	✅ Passed	The PR description comprehensively covers the changes, objectives, and context for adding experimental Python 3.14t support, with clear explanations and referenced diff hunks.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/free-threaded-cpython

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[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (eb3414d)	1903	1903	100.00%
Head commit (4740d0a)	1903 (+0)	1903 (+0)	100.00% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#46)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

See your quality gate settings    Change summary preferences

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (eb3414d) to head (4740d0a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #46   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           22        22           
  Lines         1903      1903           
=========================================
  Hits          1903      1903           

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[Copilot]

Pull request overview

This PR updates the project’s CI/tox configuration to introduce an experimental “Python 3.14t” test run, with clearer labeling in GitHub Actions and with failures allowed without failing the overall workflow.

Changes:

• Added python3.14t to the tox env list and GitHub Actions interpreter-to-toxenv mapping.
• Extended the GitHub Actions test matrix with a python3.14t entry marked experimental: true.
• Updated the GitHub Actions job name and job-level continue-on-error to reflect/handle experimental matrix entries.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
tox.ini	Adds python3.14t to envlist and maps 3.14t → python3.14t for tox-gh-actions.
.github/workflows/test.yml	Adds an experimental 3.14t matrix entry, labels experimental jobs in the job name, and allows experimental jobs to fail.