The watchdog SIGKILLed only the direct child of the wrapper. A remote
`hermes` launcher that runs the CLI without exec leaves the hung grandchild
alive after its parent dies — exactly the broken-launcher class from
#110478 — so the probe still orphaned a process on the remote. Enabling
job control (`set -m`) around the probe start puts it in its own process
group; the watchdog now kills `-$__htp` first and the direct pid as the
fallback for shells that cannot turn job control on without a tty (dash),
where behaviour is unchanged.
Review finding: watchdog SIGKILLs only its direct child; a non-exec launcher leaves the hung grandchild orphaned.
teknium1
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