Forge app uninstall event and Delete app data

Forge Forge Platform and Tools
,
1

Hello,
we are developing a Forge app that uses KVS, and SQL,
since we have to pay for storing these data, we want to delete data for the users that have uninstall the app,

so we have 2 questions:

  1. is there an event for uninstall the app that we can run like avi:forge:installed:app
  2. Does the upgrade of the app runs the uninstall and install event,

if the event exists, we are planning to delete all data related to the app, when the user uninstall the app,
what do you think about this solution,
kind regards,