ci: cleanup closed pr cache

[Brooooooklyn]

No description provided.

[Brooooooklyn]

• ci: cleanup closed pr cache #188 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[Copilot]

Pull Request Overview

This PR introduces a GitHub Actions workflow to automatically clean up cached artifacts when pull requests are closed, helping to manage storage and prevent cache accumulation.

• Adds a new workflow that triggers on PR closure events
• Implements cache cleanup using GitHub CLI to fetch and delete PR-specific cache keys
• Uses error handling to prevent workflow failures during cache deletion

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[chatgpt-codex-connector]

Codex Review: Here are some suggestions.

About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you open a pull request for review, mark a draft as ready, or comment "@codex review". If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex fix this CI failure" or "@codex address that feedback".

[Brooooooklyn]

Merge activity

• Sep 23, 3:57 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Sep 23, 3:58 AM UTC: Graphite rebased this pull request as part of a merge.
• Sep 23, 4:02 AM UTC: @Brooooooklyn merged this pull request with Graphite.