feat: add announce delivery mode for automation runs

src/automation/cron.ts

@@ -9,7 +9,7 @@ interface ChannelLookup {
   get(name: string): { send(peerId: string, message: OutboundMessage): Promise<void> } | undefined;
 }
 
-type DeliveryMode = 'shared_session' | 'isolated_job';
+type DeliveryMode = 'shared_session' | 'isolated_job' | 'announce';
 
 export class CronScheduler implements ChannelAdapter {
   readonly name = 'cron';
@@ -99,7 +99,11 @@ export class CronScheduler implements ChannelAdapter {
       this.lastTriggeredLocalDateByJob.set(jobName, dayKey);
     }
     const runId = `run-${randomUUID()}`;
-    const senderId = this.deliveryMode === 'isolated_job' ? `${jobName}:${runId}` : jobName;
+    const senderId = this.deliveryMode === 'shared_session'
+      ? jobName
+      : this.deliveryMode === 'announce'
+        ? `${jobName}:announce:${runId}`
+        : `${jobName}:${runId}`;
 
     const msg: InboundMessage = {
       id: `cron-${jobName}-${Date.now()}`,
@@ -113,6 +117,7 @@ export class CronScheduler implements ChannelAdapter {
         scheduled: true,
         modelTier: job.model_tier,
         deliveryMode: this.deliveryMode,
+        announce: this.deliveryMode === 'announce',
         runId,
         replyPeerId: jobName,
       },