Add `ProvenanceStorageInterface` as discussed during backend design
Rework backend-related classes to properly use the new interface. Adapt tests to the new structure as well.
Depends on !55 (closed)
Migrated from D5947 (view on Phabricator)
Staging instance, all changes can be removed at any time
Rework backend-related classes to properly use the new interface. Adapt tests to the new structure as well.
Depends on !55 (closed)
Migrated from D5947 (view on Phabricator)