FIX7 Final Review - T1 Go / No-Go

Final verdict: PG_NATIVE_DRIVEN_READY_FOR_T1_IMPLEMENTATION.

GO: T1 author/local/rehearsal test FIX7a/b/c and generate candidate manifests, DOT/migration, rollback, analyzer and evidence artifacts. Operator-gated: all live role/schema/extension/owner/ACL/activation/scheduler/repoint/FIX7b/FIX7c actions. NO-GO: manual SQL, operator-only activation, readiness/apply green before cutover/evidence/audit, Stage 2.6B, permits, REAL_RUN, QT001 apply. Live FIX7a may proceed only through approved pipeline with authority_cutover_complete=false.