ci: use immutable version tag for setup-uv in perf-test

[ctron]

Summary

• Fix /perf-test CI workflow failing at action resolution because astral-sh/setup-uv@v9 does not exist
• Since v8.0.0, setup-uv stopped publishing major version alias tags (v8, v9, …) for supply chain security — only immutable exact version tags are published
• Pin to v10.0.1 (latest release)

Test plan

• Comment /perf-test on a PR and verify the workflow progresses past action resolution

🤖 Generated with Claude Code

Summary by Sourcery

Fix setup-uv resolution in the performance-test workflow by replacing the unavailable major-version alias with an immutable release tag.

Bug Fixes:

• Fix the performance-test workflow by pinning setup-uv to the published immutable v10.0.1 tag.

CI:

• Update the performance-test CI workflow to use an immutable setup-uv version tag.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates the /perf-test GitHub Actions workflow to use the immutable astral-sh/setup-uv@v10.0.1 tag instead of the unavailable @v9 alias, fixing action resolution and improving supply-chain pinning.

File-Level Changes

Change	Details	Files
Pin the uv setup action to an immutable published release tag so the performance-test workflow can resolve the action reliably.	Replace the nonexistent major alias with astral-sh/setup-uv@v10.0.1. Align the workflow with setup-uv’s post-v8 distribution policy, which publishes exact version tags only.	.github/workflows/perf-test.yaml

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

Sourcery assessment

Approved.

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