chore(deps): update astral-sh/setup-uv action to v7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
astral-sh/setup-uv	action	major	v5 → v7

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Release Notes

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

v7

Compare Source

v6

Compare Source

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Configuration

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Note

Low Risk
Workflow-only dependency bump; risk is limited to potential CI/publish behavior differences introduced by the new setup-uv action version.

Overview
Updates the GitHub Actions CI, lint, and pypi-publish workflows to install uv via astral-sh/setup-uv@v7 (from v5), keeping Python setup and subsequent uv commands unchanged.

^{Written by Cursor Bugbot for commit a15350e. This will update automatically on new commits. Configure here.}

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Summary by cubic

Updated GitHub Actions workflows to use astral-sh/setup-uv v7 (from v5) in ci.yml, lint.yaml, and pypi-publish.yaml. This keeps our pipelines current and reliable with the latest fixes.

^{Written for commit a15350e. Summary will update on new commits.}

[cubic-dev-ai]

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