Method reserve

src/utils/QueryGuard.ts:38–43

* Reserve the guard for queue processing. Transitions idle → dispatching. * Returns false if not idle (another query or dispatch in progress).

()

   * Returns false if not idle (another query or dispatch in progress).
   */
  reserve(): boolean {
    if (this._status !== 'idle') return false
    this._status = 'dispatching'
    this._notify()
    return true
  }

  /**
   * Cancel a reservation when processQueueIfReady had nothing to process.