POST /broadcasting/auth carries only the 'web' middleware group
(Laravel's own withBroadcasting() registers it that way), so
PusherBroadcaster::auth() resolved retrieveUser() on the DEFAULT guard
before the admin.runs channel's own Auth::guard('operator') check ever
ran — found nobody, since an operator is never signed in on 'web', and
threw straight from there. The guard was correct but unreachable.
Fixed by naming both guards on the channel registration itself.
Also adds broadcasting/auth to RestrictAdminHost::SHARED: in exclusive
mode it was neither admin.* by name nor on the shared list, so it 404'd
on the console host too — degrading silently to wire:poll.4s rather
than breaking outright, which is why nothing screamed.
nexxo