Class EventQueue

Create an event queue.

Wait for the queue to become idle (no pending debounces, no queued items, no active work).

Enqueue an event, debounced per path+priority. Ignored once stopped.

Pause processing events. Events can still be enqueued but will not be processed.

Alias of EventQueue.start, kept for existing callers.

Resume processing events.

Start processing events (events enqueued earlier are held until now).

Stop: cancel pending debounces, drop queued events, ignore new ones, and resolve once in-flight work finishes. Drain waiters resolve then too.

Wait until there is no in-flight work.

Unlike drain, this does NOT wait for debounced or queued items to be empty. It's useful when you need to temporarily quiesce outgoing work without losing or rejecting new enqueues.