Is there a place I can see schema changes in ORDS 3.x.x

I upgraded from 3.0.4 to 3.0.12. I was looking at the "How to back out ORDS upgrade" thread as mentioned below (because I wanted to fall back from 3.0.12 to 3.0.11) and I don't have a schema export. Is it possible to just deploy 3.0.11 and start using with the existing config?

Also I found "ORDS Release Notes 3.0.12 " that talks about the various changes in versions but I can't tell if there are any schema changes. ORDS upgrade said:

Upgrading Oracle REST Data Services schema 3.0.4.60.12.48 to version 3.0.12.263.15.32

... Log file written to .........

Upgrading ORDS schema to 3.0.5

Upgrading ORDS schema to 3.0.6

So is questions are:

1. Is there a certain keyword I should looking for when I look to see if there is a schema change.

2. Can I run 3.0.11 ORDS with a schema upgraded to 3.0.12?

How to back out ORDS upgrade

Thanks!