Update dependency uv to v0.12.12

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
uv (source, changelog)	==0.12.10 → ==0.12.12

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Release Notes

astral-sh/uv (uv)

v0.12.12

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Released on 2026-09-09.

The executables in our macOS and Windows release archives and uv and uv_build wheels are now code-signed. macOS executables are signed with an Apple Developer ID certificate and notarized by Apple. Windows executables have timestamped Authenticode signatures from Azure Artifact Signing. This enables verification of the release publisher and binary integrity, supports publisher-based allowlisting, and should reduce security warnings and antivirus false positives.

Bug fixes

• Exclude distributions uploaded after the exclude-newer cutoff from lockfiles and generated requirement hashes (#​21539)

v0.12.11

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Released on 2026-09-08.

Preview features

• Generate missing artifact hashes when exporting pylock.toml files to ensure they conform to PEP 751 (#​20146)
• Warn when pylock.toml artifact hash tables are empty, which will be rejected in a future uv release (#​21462)

Performance

• Speed up installs that overwrite existing files by eliminating per-file temporary directories for atomic hard-link, symlink, and reflink replacements (#​21478)
• Speed up installs that merge copied wheels into existing environments by replacing per-file temporary directories with adjacent temporary files (#​21468)
• Speed up local wheel installs by replacing the shared ZIP cursor lock with positioned reads (#​21500)
• Speed up local wheel installs by reusing ZIP readers and buffers across extracted files (#​21499)
• Avoid transitive dependency checks and unnecessary resolution when uv pip install --no-deps finds the requested packages already installed (#​21523)

Bug fixes

• Verify source archives against hashes recorded in uv.lock before reading their metadata or running their build backends (#​21223)
• Verify supplied hashes for registry requirements pinned with === under both --verify-hashes and --require-hashes (#​21543)
• Apply hashes from public-version pins to matching local versions when no exact local-version hash is provided (#​21544)
• Support PowerShell virtual environment activation from UNC paths, including WSL paths (#​19159)
• Trim surrounding whitespace from entries in .python-version and .python-versions files (#​21529)
• Suppress VIRTUAL_ENV mismatch warnings for uv add --no-sync, uv remove --no-sync, and uv add --frozen (#​21496)
• Warn and continue when uv python list cannot query an interpreter (#​21498)

Documentation

• Restore TOML syntax highlighting for exclude-newer examples (#​21534)

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