L1: an artifact apply holding the slot past 10 min (ctor-overridable) logs an
Error site event naming it without releasing the slot; PostStop answers
queued applies Failed. L2: a boot-batch instance whose actor cannot be created
emits an Error site event and leaves the deployed set. L3: a failed enable
reverts the committed is_enabled (generation-bumped both ends). L4: the routed
SetAttributes batch Ask is the 30 s per-write bound plus 10 s mailbox slack.
An instance unique name Akka refuses as a path element (space, '#', '/',
non-ASCII) made Context.ActorOf throw on the singleton's own thread; the
default Restart stopped every Instance Actor on the site. DeployCompileValidator
now checks the instance + script/alarm/native-source actor names with
ActorPath.IsValidPathElement (the Commons ActorNameRules mirror is stricter
than Akka for " ( ), pinned by a parity sweep), CreateInstanceActor catches
InvalidActorNameException and every caller reports it, and the Instance Actor
skips a refused child name like a compile failure.