deps(python): bump multidict from 6.6.3 to 6.7.0 in /backend

[dependabot]

Bumps multidict from 6.6.3 to 6.7.0.

Release notes

Sourced from multidict's releases.

6.7.0

Contributor-facing changes

• Updated tests and added CI for CPython 3.14 -- by :user:kumaraditya303.

  Related issues and pull requests on GitHub: #1235.

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6.6.4

Bug fixes

• Fixed MutliDict & CIMultiDict memory leak when deleting values or clearing them -- by :user:Vizonex

  Related issues and pull requests on GitHub: #1233.

Contributor-facing changes

• The type preciseness coverage report generated by MyPy <https://mypy-lang.org>__ is now uploaded to Coveralls <https://coveralls.io/github/aio-libs/multidict>__ and will not be included in the Codecov views <https://app.codecov.io/gh/aio-libs/multidict>__ going forward -- by :user:webknjaz.

  Related issues and pull requests on GitHub: #1122, #1231.

• Added memory leak test for popping or deleting attributes from a multidict to prevent future issues or bogus claims. -- by :user:Vizonex

  Related issues and pull requests on GitHub: #1233.

---

Changelog

Sourced from multidict's changelog.

6.7.0

(2025-10-05)

Contributor-facing changes

• Updated tests and added CI for CPython 3.14 -- by :user:kumaraditya303.

  Related issues and pull requests on GitHub: :issue:1235.

---

6.6.4

(2025-08-11)

Bug fixes

• Fixed MutliDict & CIMultiDict memory leak when deleting values or clearing them -- by :user:Vizonex

  Related issues and pull requests on GitHub: :issue:1233.

Contributor-facing changes

• The type preciseness coverage report generated by MyPy <https://mypy-lang.org>__ is now uploaded to Coveralls <https://coveralls.io/github/aio-libs/multidict>__ and will not be included in the Codecov views <https://app.codecov.io/gh/aio-libs/multidict>__ going forward -- by :user:webknjaz.

  Related issues and pull requests on GitHub: :issue:1122, :issue:1231.

• Added memory leak test for popping or deleting attributes from a multidict to prevent future issues or bogus claims. -- by :user:Vizonex

... (truncated)

Commits

• e2a8d08 Increase wheel build timeout to 25m (#1252)
• 2822aae Release 6.7.0 (#1251)
• d40ee55 Bump actions/setup-python from 5 to 6 (#1246)
• 0fd074e Bump pytest from 8.4.0 to 8.4.2 (#1241)
• d81b859 Bump actions/download-artifact from 4 to 5 (#1250)
• e8ca43e Bump CodSpeedHQ/action from 3 to 4 (#1249)
• 47669a5 Bump actions/checkout from 4 to 5 (#1248)
• 5f9f6f8 Bump pypa/cibuildwheel from 3.1.4 to 3.2.0 (#1247)
• 254a47c Bump pyenchant from 3.2.2 to 3.3.0 (#1245)
• fea34af Bump pre-commit from 4.2.0 to 4.3.0 (#1243)
• Additional commits viewable in compare view

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Quality Gate passed

Issues
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0 Accepted issues

Measures
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0.0% Coverage on New Code
0.0% Duplication on New Code

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[dependabot]

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