metamodel
The uniqueness constraints the governance stores need. Declared as data in dice-storage so the constraint list and the label list the observed-schema source excludes stay one edit apart.
Graph-only, since it is DDL for the Drivine stores below. No @ConditionalOnMissingBean, matching the other schema beans in this module. Catalogs accumulate, so a consumer adding their own gets both, and these are still required.