chore(deps): bump multidict from 6.7.1 to 6.9.0

[dependabot]

Bumps multidict from 6.7.1 to 6.9.0.

Release notes

Sourced from multidict's releases.

6.9.0

Bug fixes

• Protected repr() of MultiDict, MultiDictProxy, and their views in the C extension with a critical section, avoiding data races on the free-threaded build of CPython -- by :user:asvetlov.

  Related issues and pull requests on GitHub: #1431.

• Guarded repr() of MultiDictProxy in the C extension and of KeysView in both the C extension and the pure-Python implementation against infinite recursion on self-referential containers, matching the existing guard on MultiDict, ItemsView, and ValuesView -- by :user:asvetlov.

  Related issues and pull requests on GitHub: #1431.

• Protected MultiDict.update(), .extend(), .merge(), .clear(), .copy(), and the MultiDict/CIMultiDict constructors in the C extension with a critical section, using the two-object form when a second multidict, multidict proxy, or plain dict instance is involved, avoiding data races and a segmentation fault on the free-threaded build of CPython. .clear() now also publishes the empty table before releasing any entry's references, so a concurrent caller can never observe a partially-cleared multidict even if releasing a value runs arbitrary Python code that suspends the held critical section -- by :user:asvetlov.

  Related issues and pull requests on GitHub: #1433.

• Protected MultiDict.add(), __setitem__/__delitem__, get()/getone()/__getitem__, __contains__, getall(), setdefault(), pop()/popone()/popall()/popitem(), __eq__, iteration, and the &/|/-/^/in/ isdisjoint() operations on .keys() and .items() views in the C extension with a critical section, avoiding data races and use-after-free crashes on the free-threaded build of CPython -- by :user:asvetlov.

  Related issues and pull requests on GitHub: #1438.

• Fixed a data race on the free-threaded build where MultiDictObject.used was written non-atomically while len() read it with a relaxed atomic load -- by :user:asvetlov.

... (truncated)

Changelog

Sourced from multidict's changelog.

6.9.0

(2026-09-18)

Bug fixes

• Protected repr() of MultiDict, MultiDictProxy, and their views in the C extension with a critical section, avoiding data races on the free-threaded build of CPython -- by :user:asvetlov.

  Related issues and pull requests on GitHub: :issue:1431.

• Guarded repr() of MultiDictProxy in the C extension and of KeysView in both the C extension and the pure-Python implementation against infinite recursion on self-referential containers, matching the existing guard on MultiDict, ItemsView, and ValuesView -- by :user:asvetlov.

  Related issues and pull requests on GitHub: :issue:1431.

• Protected MultiDict.update(), .extend(), .merge(), .clear(), .copy(), and the MultiDict/CIMultiDict constructors in the C extension with a critical section, using the two-object form when a second multidict, multidict proxy, or plain dict instance is involved, avoiding data races and a segmentation fault on the free-threaded build of CPython. .clear() now also publishes the empty table before releasing any entry's references, so a concurrent caller can never observe a partially-cleared multidict even if releasing a value runs arbitrary Python code that suspends the held critical section -- by :user:asvetlov.

  Related issues and pull requests on GitHub: :issue:1433.

• Protected MultiDict.add(), __setitem__/__delitem__, get()/getone()/__getitem__, __contains__, getall(), setdefault(), pop()/popone()/popall()/popitem(), __eq__, iteration, and the &/|/-/^/in/ isdisjoint() operations on .keys() and .items() views in the C extension with a critical section, avoiding data races and use-after-free crashes on the free-threaded build of CPython -- by :user:asvetlov.

  Related issues and pull requests on GitHub: :issue:1438.

... (truncated)

Commits

• 087fbed Update CHANGE for the release fix PR (#1476)
• c715fac Stop installing hypothesis where its tests never run (#1475)
• e1ddc39 Release 6.9.0 (#1474)
• a9aa239 Speed up adding many values for the same key (#1466)
• 684b085 Disable pytest output capturing in the ASan/TSan CI jobs (#1472)
• 255ad03 Add bencmarks for setitem (#1471)
• 72eadcc Skip abstractmethods from coverage leaks report (#1470)
• 445f9f9 Drop dead code (#1469)
• f4218f8 Build(deps): Bump actions/upload-artifact from 4 to 7 (#1468)
• 838ebf7 Bump to 6.9.0.dev0 (#1467)
• Additional commits viewable in compare view

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[dependabot]

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