Event Stream

Stream resource state changes via Server-Sent Events.

Subscribes to NATS state notifications for the authenticated tenant and forwards them as SSE events. Each event contains the full resource JSON after a state transition, with optional event metadata (from_state, event_type) when available.

SSE events use event: state_change when lifecycle event metadata is present, otherwise a generic message event.

The connection stays open until the client disconnects.

Returns: SSE stream of resource state change events.