Inject RelationshipService into CanonicalImportOrchestrator and walk
PARENT_OF edges in the family network after both person loaders finish
(before documents). For every edge where child.generation is set and
not strictly deeper than parent.generation, log a WARN — soft check,
never fails the batch.
Reads through getFamilyNetwork() per the layering rule (orchestrator
never touches PersonRelationshipRepository directly). Curators see the
warning in the import log; the rest of the pipeline is unaffected so
data with curatorial gaps still loads cleanly.
Refs #689
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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