ADR-027: Automated Connector Pipeline — credential broker, pipeline-run root, deploy-gate
scan_runs is the pipeline-run root; stage outcomes are stamped onto scan_runs.category_results under reserved __stage keys; a typed CredentialBroker is the only runtime path that resolves CredentialsRef; deploy-gate rematerialization (ADR-026 path b) is one job kind, generalised to all derived collections.