title: How to be notified when dead letter queue blob storage is created
body: <p>I have One Event Grid topic where I publish my events and subscribe them by Azure function Event grid trigger.</p>
  
  <p>In Event Subscription I configured Dead letter queue setting and store all undelivered events in blobs.</p>
  
  <p>Could you please suggest me how to read/notify about those blobs entries.</p>