Migrating to the latest version of keycloak from version 11.0.2

Going to answer my own question here in case it benefits someone else. In the end there was nothing to be concerned about. I made a copy of my existing Keycloak DB, pointed the latest version of Keycloak to it, and Bob’s you uncle! Keycloak simply upgraded my DB without any issues whatsoever. All data was preserved. Damn impressive considering that I went from v11 to v26.