* feat(gateway): let NAS broker the scale-to-zero suspend where the guest has no lever
* fix(gateway): require the going_idle ack and outlast the broker before suspending
* fix(gateway): release the redial hold on every path that abandons the suspend
* fix(gateway): hold the re-dial only for the brokered lever, and require it
* fix(gateway): make the re-dial hold contract real and fence the in-guest suspend too
* refactor(gateway): share the watcher-iteration and descriptor helpers across the sleep tests
* refactor(gateway): move the sleep tests' repeated setup into their fixtures
* refactor(gateway): one docstring line per sleep test, and parametrise the abort and lever paths
* fix(gateway): fence the freeze gap, cool down aborts, and stop clobbering a shutdown drain
* fix(gateway): slice the Fly freeze fence on the wall clock and widen it for larger machines
Nacho Avecilla
a6e10e693f