One EPHEMERAL spoken narration of delegated-run progress, emitted on
RealtimeSessionService.DelegationNarration$. These are the interim "here's what's
happening" utterances the realtime model speaks while a delegation runs. By product
decision they are NOT captions and NOT persisted as ConversationDetails — they exist
only as a live note in the overlay, replaced by each newer narration.
One EPHEMERAL spoken narration of delegated-run progress, emitted on RealtimeSessionService.DelegationNarration$. These are the interim "here's what's happening" utterances the realtime model speaks while a delegation runs. By product decision they are NOT captions and NOT persisted as ConversationDetails — they exist only as a live note in the overlay, replaced by each newer narration.