Release v0.4.0

[github-actions]

Release v0.4.0

Auto-generated by the Prepare Release workflow.

What changed

• Version bumped to v0.4.0 in pyproject.toml and docs/conf.py
• CHANGELOG.rst updated from towncrier fragments
• docs/_root/switcher.json updated with the new version entry
• Root redirect updated to point to this release

Review checklist

• CHANGELOG.rst reads well — edit the fragment text directly if needed
• Version strings are correct in pyproject.toml and docs/conf.py
• switcher.json has the right label and URL
• CI passes

After merging

Create and push the tag to trigger the Release and Docs workflows:

git fetch origin
git tag v0.4.0 origin/main
git push origin v0.4.0

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.18%. Comparing base (bf9d441) to head (8ca2736).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #35   +/-   ##
=======================================
  Coverage   90.18%   90.18%           
=======================================
  Files          39       39           
  Lines        3902     3902           
=======================================
  Hits         3519     3519           
  Misses        383      383           

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