- ADR-044 extends ADR-039 to the relationship edge: LocalDate+DatePrecision, update re-validation of create invariants, no @Version (last-write-wins), DELETE→404 anti-enumeration alignment, precise derived marriage date, and the relationshipDates.ts location reusing the existing person→shared boundary. - db-orm.puml: person_relationships now carries from_date/from_date_precision/ to_date/to_date_precision; db-relationships.puml gets a V78 columns-only note. - DEPLOYMENT.md §5: V78 deploy note — no maintenance window, stop-old-then-start ordering (not rolling-deploy-safe), targeted pg_restore rollback. - CLAUDE.md error-code list gains INVALID_RELATIONSHIP_DATES. - rtm.md: REQ-001..REQ-019 for #837 mapped to impl + tests, all Done. Refs #837 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>