Request all module developers to provide DB migration support OR at the very least, flag those modules that had schema changes (include in the definition of done and ensure compliance by having POs only accept a story if there is db migration support)
Support cross version upgrade, for example from version 8 to version 10 directly (sort all schema.json elements by modVersion first?)
Support downgrade (or backwards compatible?) --- could prob be deferred
Support actual jsonb data migration (or as is by sql?)
Potential support for other databases --- could prob be deferred