CONTROL_PLANE_EVENT_SOURCE
constCONTROL_PLANE_EVENT_SOURCE:Record<ControlPlaneEventType,ControlPlaneEventSource>
Canonical source classification for every control-plane event type — mirrors
the scaffold taxonomy. system covers identity/auth + CLI command telemetry;
workflow covers change-set lifecycle, config, and product-entity actions.
Typed as a total Record, so adding a new ControlPlaneEventType in scaffold
without classifying it here is a compile error.