Hook processes are fire-and-forget: the binary's exit drain acknowledges
spawns only, so the STARTED writer can land after the terminal one. The
macro-bracketing tests waited only for the terminal marker and then
asserted STARTED's count immediately, flaking on Windows CI and loaded
Linux runners. The bounded wait now covers every expected marker before
the exact-count and absence assertions run; the probe script's scenario K
comment is corrected to state the spawn-ack-only contract it already
waits around.
Dark-Alex-17
611900057c