fix: stamp task rows with ISO timestamps

insertTaskRow used SQL datetime('now') — a naive-UTC stamp the container
formatter parses as local time, rendering <task time> hours off from the
ISO-Z chat timestamps beside it. Stamp ISO like every other messages_in
writer.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A2YZQDTw9TQrH3m8NBtVAW

container/agent-runner/src/formatter.test.ts

@@ -14,7 +14,7 @@ import { describe, it, expect, beforeEach, afterEach } from 'bun:test';
 import { initTestSessionDb, closeSessionDb, getInboundDb } from './db/connection.js';
 import { getPendingMessages } from './db/messages-in.js';
 import { formatMessages, stripInternalTags } from './formatter.js';
-import { TIMEZONE } from './timezone.js';
+import { TIMEZONE, formatLocalTime } from './timezone.js';
 
 beforeEach(() => {
   initTestSessionDb();
@@ -109,6 +109,14 @@ describe('timestamp formatting', () => {
   });
 });
 
+describe('task timestamps', () => {
+  it('renders task time in the user TZ, same as chat rows', () => {
+    insertMessage('t1', 'task', { prompt: 'do the thing' }, { timestamp: '2026-01-05T12:00:00.000Z' });
+    const result = formatMessages(getPendingMessages());
+    expect(result).toContain(`time="${formatLocalTime('2026-01-05T12:00:00.000Z', TIMEZONE)}"`);
+  });
+});
+
 describe('reply_to + quoted_message rendering', () => {
   it('renders reply_to attribute and quoted_message when all fields present', () => {
     insertMessage('m1', 'chat', {

src/modules/scheduling/db.ts

@@ -33,10 +33,11 @@ export function insertTaskRow(
 ): void {
   db.prepare(
     `INSERT INTO messages_in (id, seq, timestamp, status, tries, process_after, recurrence, kind, platform_id, channel_type, thread_id, content, series_id)
-     VALUES (@id, @seq, datetime('now'), @status, 0, @processAfter, @recurrence, 'task', NULL, NULL, NULL, @content, @seriesId)`,
+     VALUES (@id, @seq, @timestamp, @status, 0, @processAfter, @recurrence, 'task', NULL, NULL, NULL, @content, @seriesId)`,
   ).run({
     status: 'pending',
     ...row,
+    timestamp: new Date().toISOString(),
     seq: nextEvenSeq(db),
   });
 }