## Summary
- Extend the nightly disk cleanup workflow to run on both ci1 and ci2
self-hosted macOS runners
- Update the guard step to accept ci2 as a valid runner name

## Test plan
- Verify the workflow file syntax is correct
- The nightly cleanup will run on both ci1 and ci2 runners

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Extend the nightly disk cleanup to run on both ci1 and ci2 using a
strategy matrix with fail-fast: false so each runner executes
independently. Removed the guard step and related conditions, and
updated comments to reflect both runners.

<sup>Written for commit d1a2a3d4d8d1392960aabf536afb152a9db89698.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk CI workflow change that only affects scheduled cleanup
execution on self-hosted runners; main risk is increased load or
unexpected cleanup behavior now running on `ci2` as well.
> 
> **Overview**
> Expands the nightly macOS runner disk cleanup workflow to run on both
self-hosted runners `ci1` and `ci2` by switching the job to a matrix
strategy and targeting `runs-on: ${{ matrix.runner }}`.
> 
> Removes the previous runner-name guard and conditional step execution
so the cleanup script always runs for each matrix runner invocation.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
d1a2a3d4d8d1392960aabf536afb152a9db89698. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>