Plugin names whose routes are left out of the generated document,
matched against RouteInfo.owner.
Defaults to ['health-plugin', 'metrics-plugin'], so an application's
operational surface (/health, /live, /ready, /metrics) does not
flow into every client generated from the document. Pass [] to document
them again.
Owners rather than paths, because those endpoints are configurable: a static path list would silently stop excluding a renamed one.