.github/workflows: Migrate workflows to Blacksmith runners

[useblacksmith-dev]

To whomever may be reviewing this PR,

Blacksmith is the fastest way to run your GitHub Actions.

What does this PR change?

This PR has been automatically generated by a team member in your GitHub organization using Blacksmith's Migration Wizard, or MigWiz for short. This PR changes the following:

1. Your selected workflows will now run on Blacksmith's 2x faster hardware (e.g., runs-on: blacksmith-4vcpu-ubuntu-2204). Learn more about the different instances available to choose from.
2. Your jobs running on Blacksmith will now have all official GitHub and popular third-party cache actions automatically interact with our 4x faster, colocated cache. Learn more about Blacksmith's actions cache.
3. Your GitHub Actions will now actually be observable. Learn more about Blacksmith's logging and other observability features.
4. Your Docker builds will now automatically share their Docker layer cache, resulting in up to 40x faster builds. Learn more about Blacksmith's Docker layer caching.

FAQ

• Is this free? The first 3,000 minutes per month are free.
• Who uses Blacksmith? Clerk, Ashby, VEED, and 600+ others.
• What's the catch? There is none. Merge this thing already.

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• Autofix CI and bot reviews

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• Autofix CI and bot reviews (Staging)

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 9b710a8. Configure here.}

[cursor]

Python 3.8 unavailable on Ubuntu 24.04 runner

High Severity

Switching the runner from ubuntu-latest to blacksmith-4vcpu-ubuntu-2404 (Ubuntu 24.04) breaks the workflow because actions/setup-python@v2 with python-version: '3.8' will fail — Python 3.8 prebuilt binaries are not available on Ubuntu 24.04 images. Python 3.8 reached end-of-life and was removed from 24.04 runner images. The previous ubuntu-latest (22.04) still had Python 3.8 support.

 

^{Reviewed by Cursor Bugbot for commit 9b710a8. Configure here.}