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Task O.3: IiosAuditLink (traceId/correlationId/scopeId/actorRefId/action/ resourceType/resourceId) + recordAudit() helper (reads the current trace from ALS, best-effort). Written at the decision/mutation points — route approve/deny, AI accept/reject, meeting summarize, outbound send — so the trace appears in DB and a decision can be replayed / traced across services (mandated iios_audit_link). Migration audit-link; resetDb truncates it. 2 tests bind approve/accept to a trace. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>