feat(automation): add isolated job delivery mode

src/automation/cron.ts

@@ -2,12 +2,15 @@ import { Cron } from 'croner';
 import type { CronJobConfig } from '../config/schema.js';
 import type { ChannelAdapter, ChannelStatus, InboundMessage, OutboundMessage } from '../channels/types.js';
 import { auditLogger } from '../audit/index.js';
+import { randomUUID } from 'crypto';
 
 /** Minimal interface for the parts of ChannelRegistry we need. */
 interface ChannelLookup {
   get(name: string): { send(peerId: string, message: OutboundMessage): Promise<void> } | undefined;
 }
 
+type DeliveryMode = 'shared_session' | 'isolated_job';
+
 export class CronScheduler implements ChannelAdapter {
   readonly name = 'cron';
   private _status: ChannelStatus = 'disconnected';
@@ -18,6 +21,7 @@ export class CronScheduler implements ChannelAdapter {
   constructor(
     private readonly jobConfigs: CronJobConfig[],
     private readonly channelLookup: ChannelLookup,
+    private readonly deliveryMode: DeliveryMode = 'shared_session',
   ) {
     for (const job of jobConfigs) {
       this.jobs.set(job.name, job);
@@ -85,15 +89,24 @@ export class CronScheduler implements ChannelAdapter {
   triggerJob(jobName: string): void {
     const job = this.jobs.get(jobName);
     if (!job) {return;}
+    const runId = `run-${randomUUID()}`;
+    const senderId = this.deliveryMode === 'isolated_job' ? `${jobName}:${runId}` : jobName;
 
     const msg: InboundMessage = {
       id: `cron-${jobName}-${Date.now()}`,
       channel: 'cron',
-      senderId: jobName,
+      senderId,
       senderName: `cron:${jobName}`,
       text: job.message,
       timestamp: Date.now(),
-      metadata: { cronJob: jobName, scheduled: true, modelTier: job.model_tier },
+      metadata: {
+        cronJob: jobName,
+        scheduled: true,
+        modelTier: job.model_tier,
+        deliveryMode: this.deliveryMode,
+        runId,
+        replyPeerId: jobName,
+      },
     };
 
     auditLogger?.cronTrigger({