Seed a 1-area/1-line/1-equipment/1-tag Equipment namespace, StartDeployment via the
in-process 2-node harness, and assert the persisted artifact decodes (ParseComposition)
to the equipment signal (FullName from TagConfig) + friendly UNS folder names. Covers the
ConfigComposer -> ArtifactBlob -> ParseComposition.EquipmentTags seam the unit tests only
approximated with hand-built JSON. (OPC UA browse is covered against a real SDK node manager
in Phase7ApplierHierarchyTests; the cluster harness binds the no-op sink.)