Constraint: Keep payment documentation in existing formal docs rather than creating a parallel guide.\nRejected: Treating biz_payment_record as verified production tables | Current evidence only supports target/prototype semantics.\nConfidence: high\nScope-risk: narrow\nDirective: Do not move payment fact ownership into REV004; REV004 should reference REV003/SYS009 payment facts only.\nTested: make validate-file on main touched docs; make check-ai-governance; git diff --check.\nNot-tested: Full export/render pipeline.
