Handle out-of-order/duplicates for official extensions

[huangjeff5]

[READ] Step 1: Are you in the right place?

Issues filed here should be about a feature request for a specific extension in this repository. To file a feature request that affects multiple extensions or the Firebase Extensions platform, please reach out to
Firebase support directly.

[REQUIRED] Step 2: Extension name

This feature request is for extension: _ (storage-resize-images, firestore-send-email, etc)

What feature would you like to see?

Describe the feature you would like to add, or how you'd like to see the extension change.

How would you use it?

Tell us how you'd use this feature in your app.

[cabljac]

(add processing field/status field so no duplicates)