Have inherited a website with current installed version of Umbraco Forms: 8.10.3 on a site running Umbraco version 8.18.0.

The Umbraco Forms definitions are stored as JSON in a Blob folder stored in Azure.

What I am looking for help with is:

1. It is my understanding that I can't find a previous version of the form definition - only a current one - so if I want to get a reference to the state of the form (ie what fields there were, and their settings) at the time a record was submitted this presently is not possible. Or is it?
2. If I were to upgrade to a later version of Forms then the definition would be stored in the DB and not a file. Is it possible to do this upgrade?
3. If the definition is stored in the DB does it then become possible to access a version history and get a definition for the form at the time the entry was made.