message: add more forgiving queue expiration
diff: @@ -100,7 +100,7 @@ class Indexers extends EventEmitter {
  // blocking publish.
  await this.jobQueue.publishAndWait('hub/indexers/update',
  { forceRefresh, hints },
  - { singletonKey: 'hub/indexers/update', singletonNextSlot: true }
  + { singletonKey: 'hub/indexers/update', singletonNextSlot: true, expireIn: '2 hours' }
  );
  }
  