Method enqueue

enterprise/tailnet/pgcoord.go:1519–1529

enqueue adds the key to the workQ if it is not already pending.

(keys ...K)

// enqueue adds the key to the workQ if it is not already pending.
func (q *workQ[K]) enqueue(keys ...K) {
	q.cond.L.Lock()
	defer q.cond.L.Unlock()
	for _, key := range keys {
		if slices.Contains(q.pending, key) {
			continue
		}
		q.pending = append(q.pending, key)
	}
	q.cond.Signal()
}

// acquireBatch blocks until at least one pending key is available, then
// returns up to limit keys, moving them to inProgress. Caller must call