deps(python): bump idna from 3.10 to 3.11 in /backend

[dependabot]

Bumps idna from 3.10 to 3.11.

Changelog

Sourced from idna's changelog.

3.11 (2025-10-12)

• Update to Unicode 16.0.0, including significant changes to UTS46 processing. As a result of Unicode ending support for it, transitional processing no longer has an effect and returns the same result.
• Add support for Python 3.14, lowest supported version is Python 3.8.
• Various updates to packaging, including PEP 740 support.

Commits

• ad949ee Release v3.11
• cae4ba7 Second release candidate for 3.11
• 8adb305 Add space in RST link
• 74cb2b6 Release candidate for 3.11
• 05dab09 Format idna-data with ruff
• 90eac78 Apply ruff formatting
• a31ce7e Remove errant test vectors
• 81f0333 Omit vectors known to be broken in test suite
• a0f3257 Merge branch 'master' into unicode-16-uts46-changes
• 38d9886 Remove extra UTS46 test vector
• Additional commits viewable in compare view

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Summary by cubic

Upgrade idna in the backend from 3.10 to 3.11 to adopt Unicode 16.0 and the latest UTS46 behavior for IDNs. This improves internationalized domain handling and aligns with current Python versions.

• Dependencies

  • Bumped idna to 3.11 in pyproject.toml and uv.lock.
  • Supported Python versions now 3.8+ (adds 3.14 support).

• Migration

  • If any logic/tests rely on UTS46 transitional processing, re-run and update expectations (it no longer changes results).
  • Smoke-test URL parsing and internationalized domains via httpx.

^{Written for commit 269be04. Summary will update on new commits.}

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[cubic-dev-ai]

No issues found across 2 files

[dependabot]

Looks like idna is up-to-date now, so this is no longer needed.