feat: add announce delivery mode for automation runs

src/automation/cron.test.ts

@@ -98,6 +98,22 @@ describe('CronScheduler', () => {
     expect(messages[0].metadata?.deliveryMode).toBe('isolated_job');
   });
 
+  it('uses announce sender IDs and metadata when delivery mode is announce', async () => {
+    const jobs = [makeCronJob()];
+    scheduler = new CronScheduler(jobs, asCronChannelRegistry(mockChannelRegistry), 'announce');
+
+    const messages: InboundMessage[] = [];
+    scheduler.onMessage((msg: InboundMessage) => messages.push(msg));
+    await scheduler.connect();
+    scheduler.triggerJob('test-job');
+
+    expect(messages).toHaveLength(1);
+    expect(messages[0].senderId).toMatch(/^test-job:announce:run-/);
+    expect(messages[0].metadata?.replyPeerId).toBe('test-job');
+    expect(messages[0].metadata?.deliveryMode).toBe('announce');
+    expect(messages[0].metadata?.announce).toBe(true);
+  });
+
   it('forwards response to output channel on send()', async () => {
     const mockOutputAdapter = {
       send: vi.fn().mockResolvedValue(undefined),