RelationToken enum (UP/DOWN/SPOUSE/SIBLING) with reverse(), and
RelationshipInferenceService with:
- Bidirectional adjacency map: PARENT_OF emits UP and DOWN, SPOUSE_OF
and SIBLING_OF both directions.
- Virtual SIBLING edges derived from shared parents — no SIBLING_OF
row required for siblings to appear.
- BFS with MAX_DEPTH=8.
- 17-entry LABEL_MAP covering parent, child, spouse, sibling, grand*,
great-grand*, uncle/aunt, niece/nephew, great-uncle/aunt, great-niece/
nephew, in-law parent/child, sibling-in-law (both paths), cousin_1.
- "distant" fallback for any path not in LABEL_MAP.
- Two-sided labels via path reversal.
18 unit tests written first against a stub; all 18 confirmed red, then
green after implementation. PersonControllerTest's anonymous DTO updated
for the new isFamilyMember() projection.
Refs #358.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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