Lists the site migrations saved on the account in the GSC Wizard app (Migration Compare), most recently updated first: id, name, mode (cross-property, two-urls or regex), the old (siteUrlA) and new (siteUrlB) property, go-live date, window settings, the redirect-mapping label, whether daily re-check alerts are on, and the last health snapshot from that re-check (status, recovery, risk score, redirect problem counts). Pass an id to get_migration_health as migrationId for the full analysis. Takes no arguments.