chore(deps): update dependency astral-sh/uv to v0.12.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
astral-sh/uv	uses-with	patch	0.12.2 → 0.12.3

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Release Notes

astral-sh/uv (astral-sh/uv)

v0.12.3

Compare Source

Released on 2026-08-07.

Python

• Add CPython 3.13.15 (#​20997)

Preview features

• Add --output-format to select automatic, human-readable, or raw-byte output for uv cache size (#​20992)
• Preserve JSON output from uv workspace metadata --quiet while suppressing diagnostics (#​20991)
• Reduce memory usage for large workspaces by streaming uv workspace metadata JSON output (#​20990)

Performance

• Reduce Linux startup latency by initializing the workspace cache before spawning another thread (#​20989)
• Reuse compiled workspace exclusion patterns during workspace discovery (#​20988)
• Speed up conflict-heavy resolutions by avoiding materialized range complements (#​20982)
• Avoid slow procfs reads during Python interpreter discovery on Linux (#​20987)

Documentation

• Add PEP 740 attestations to the GitHub Actions publishing example (#​20986)
• Restrict the GitHub Actions publishing example to Python version tags (#​20973)
• Correct --python-pin to --pin-python in the uv init --bare example (#​20876)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.32%. Comparing base (69eab4e) to head (3f1899c).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1908   +/-   ##
=======================================
  Coverage   87.32%   87.32%           
=======================================
  Files         352      352           
  Lines       13713    13713           
  Branches      675      675           
=======================================
  Hits        11975    11975           
  Misses       1494     1494           
  Partials      244      244           

Flag	Coverage Δ
unittests	87.32% <ø> (ø)

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