* fix: add SIGKILL fallback to process timeout kills
proc.kill() only sends SIGTERM; SSH processes stuck in network I/O can
ignore SIGTERM and cause the CLI to hang forever waiting on proc.exited.
Add killWithTimeout() to shared/ssh.ts that sends SIGTERM then SIGKILL
after a 5s grace period. Replace all 10 proc.kill() timeout sites across
Fly, AWS, DigitalOcean, GCP and Hetzner providers.
Agent: code-health
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
* chore: format files with biome
---------
Co-authored-by: B <6723574+louisgv@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
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