The current behavior - when we delete an entity f1, all tags associate to f1 which got propagated
to downstream entities are removed – PII tag propagated to process1 and t1 is removed
When entity f1 is deleted, retain the propagated classification edges, so the downstream entities
– process1 and t1 continue to have PII classification associated to them
In cases of hard delete, the source entity (f1) is deleted from atlas, but its classification vertex
(PII) continue to exist and will continue propagating to process1 and t1.