Next Step Suggestion #2

My suggestion for you is to build a more general version of this versioner to be able not only to manage databases schema but sub-entities in general
for example instead of having:

(:Database)--(:State)-[:HAS_SCHEMA]->(:Schema)
(:Schema)--(:State)-[:HAS_TABLE]->(:Table)

we can have a generalization like this:

(:Parent_Entity)--(:State)-[:HAS_SUB_ENTITY]->(:Sub_Entity)
(:Sub_Entity)--(:State)-[:HAS_SUB_ENTITY]->(:Sub_Entity_2)

If this can be handled in another way that I missed please let me know !!