feat(gateway): add interrupt preemption telemetry and requester notice

src/audit/logger.ts

@@ -19,6 +19,7 @@ import type {
   SessionCheckpointEvent,
   SessionAutoCompactEvent,
   UserActionEvent,
+  QueuePreemptEvent,
   BackendRouteEvent,
   BackendFallbackEvent,
   CronTriggerEvent,
@@ -194,6 +195,11 @@ export class AuditLogger {
     this.write({ level: 'info', event_type: 'user.action', event: event as unknown as Record<string, unknown> });
   }
 
+  queuePreempt(event: QueuePreemptEvent): void {
+    if (!this.shouldLog('sessions', 'info')) {return;}
+    this.write({ level: 'info', event_type: 'queue.preempt', event: event as unknown as Record<string, unknown> });
+  }
+
   backendRoute(event: BackendRouteEvent): void {
     if (!this.shouldLog('sessions', 'info')) {return;}
     this.write({ level: 'info', event_type: 'backend.route', event: event as unknown as Record<string, unknown> });

src/audit/types.ts

@@ -11,6 +11,7 @@ export type AuditEventType =
   | 'skills.installer.execution_blocked' | 'skills.installer.command_result' | 'skills.registry_install'
   // Session lifecycle
   | 'session.create' | 'session.message' | 'session.delete' | 'session.transfer' | 'session.compact' | 'session.checkpoint' | 'session.auto_compact' | 'user.action'
+  | 'queue.preempt'
   | 'backend.route' | 'backend.fallback'
   // Automation - Cron
   | 'cron.trigger' | 'cron.sent' | 'cron.add' | 'cron.remove'
@@ -210,6 +211,16 @@ export interface UserActionEvent {
   command?: string;
 }
 
+export interface QueuePreemptEvent {
+  session_id: string;
+  channel: string;
+  sender: string;
+  lane_id: string;
+  request_id: string;
+  mode: 'interrupt';
+  cancelled_active_run: boolean;
+}
+
 export interface BackendRouteEvent {
   session_id: string;
   channel: string;