Installer canary failure

[github-actions]

The installer canary failed (event: workflow_dispatch). Legs: linux=failure, macos=success, windows=success. See https://github.com/basecamp/basecamp-cli/actions/runs/30306010077 for details.

[jeremy]

Deliberate notify-path drill for the new canary alerting (run 30306010077, temporary broken assert since reverted). The mechanics work: linux leg failed, notify job filed this issue with per-leg results. Closing.