use codex_protocol::protocol::Event;/// Host-provided fire-and-forget sink for extension-generated events.////// Extensions construct protocol events with the correlation id appropriate for/// the callback they are handling, then leave persistence, ordering, transport/// fanout, and logging decisions to the host.pub trait ExtensionEventSink: Send + Sync {    /// Queue one protocol event for host-owned delivery.    fn emit(&self, event: Event);}/// Event sink used when the host does not expose extension event emission.#[derive(Debug, Default, Clone, Copy)]pub struct NoopExtensionEventSink;impl ExtensionEventSink for NoopExtensionEventSink {    fn emit(&self, _event: Event) {}}