[bps]

Summary

Update the outdated actions responsible for the Node.js deprecation and cache-restore warnings in the scheduled Hardcover API integration run.

• Upgrade actions/checkout from v4 to v7.0.1 across CI, integration, and release workflows.
• Upgrade astral-sh/setup-uv from v4 to v10.2.0, replacing its Node.js 20 runtime and old cache client.
• Keep caching enabled in CI and integration, and explicitly set prune-cache: true to preserve the previous pruning behavior.
• Give each Python matrix job a distinct cache suffix. The first hosted run exposed simultaneous cache-save collisions; separate keys eliminate those warnings without changing Python selection.
• Use the full setup-uv version tag because newer releases no longer publish major/minor tags.

Both upgraded actions use Node.js 24. Workflow triggers, permissions, and test commands are unchanged.

This PR is based on current main, including merged #32, and contains only the separate workflow fix.

Validation

• go run github.com/rhysd/actionlint/cmd/actionlint@latest: passed.
• git diff --check origin/main...HEAD: passed.
• Verified the upstream release tags, Node.js runtimes, cache client upgrade, and relevant changed defaults.

Hosted CI run passed all four jobs: Python 3.10, 3.11, 3.12, and prek. The logs show no Node deprecation or cache restore/save warnings, and all three Python jobs successfully saved their distinct uv caches. The scheduled integration and release workflows have not been run from this branch.