0018: Compute relationship issues at read time

Status:

Accepted

Date:

2026-10-19

Context

missing_target, ambiguous_target and duplicate_uuid depend on other records, including records of other registrations, which can change without the record itself changing.

Decision

Ingest stores only per-document issues. Relationship issues are computed on the detail request from a RelationshipIndex built from the published rows that can affect that one record, plus the record’s own identity siblings.

Consequences

• Issues are never stale after another registration changes.

• Candidates of other identities are not link targets and do not participate in duplicate detection.

• The targeted fetch keeps the detail request cheap; see Performance.