Classes
Flarum's counterpart to Illuminate's queue:pause: the upstream command
type-hints the concrete QueueManager, which Flarum replaces with its own
factory. The queue argument accepts `queue` or `connection:queue`; the
connection defaults to the active queue connection's name.
Flarum's counterpart to Illuminate's queue:resume — see PauseCommand for
why the upstream commands cannot be reused directly.