ci: fix iOS simulator boot timeout

[thymikee]

Summary

Fixes the iOS simulator boot timeout wrapper merged with #842. The previous watchdog used a pre-created mktemp marker, so a successful boot could still be treated as a timeout. This replaces the background watchdog with a simple Perl alarm around simctl bootstatus.

Validation

Validated YAML parsing and the embedded bash script syntax locally. The prior failed iOS run showed bootstatus finished successfully before the marker bug forced a failure.

[github-actions]

Size Report

Metric	Base	Current	Diff
JS raw	1.3 MB	1.3 MB	0 B
JS gzip	427.0 kB	427.0 kB	0 B
npm tarball	561.8 kB	561.8 kB	0 B
npm unpacked	1.9 MB	1.9 MB	0 B

Startup median (7 runs, lower is better):

Scenario	Base	Current	Diff
CLI --version	30.9 ms	30.8 ms	-0.2 ms
CLI --help	51.4 ms	50.0 ms	-1.4 ms

Top changed chunks: no changes in the largest emitted chunks.

[thymikee]

Reviewed the iOS boot timeout fix at dde1abc. The old mktemp marker path could report a timeout after a successful bootstatus; the new perl alarm wrapper preserves the real simctl bootstatus exit code and only treats SIGALRM/142 as timeout.

All required checks are green, including iOS smoke. No findings; merge-ready. Residual risk is limited to the standard shell 128 + SIGALRM exit-code convention and alarm behavior across exec, which the workflow run validates on the target runner.

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-06-23 14:25 UTC