fix(scheduled-task): enable worker by default and add WeChat preflight

Scheduled automations were saved but never executed because the worker
required an explicit env flag. Follow H5_REMINDER_WORKER_ENABLED when unset,
add WeChat preflight to write tasks deterministically, and surface worker
warnings on create.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/portal-integration-services-bootstrap.mjs

@@ -11,6 +11,7 @@ import { createPageEditSessionService } from '../mindspace-page-edit-session.mjs
 import { createNotificationDispatcher } from '../notification-dispatcher.mjs';
 import { startScheduleReminderWorker } from '../schedule-reminder-worker.mjs';
 import { startScheduledTaskWorker } from '../scheduled-task-worker.mjs';
+import { isScheduledTaskWorkerEnabled } from '../scheduled-task-worker-config.mjs';
 import { isPassiveCanaryRuntime } from './portal-runtime-role.mjs';
 import { loadWechatMpModule } from '../wechat-mp-loader.mjs';
 import { createToolGateway } from '../tool-gateway.mjs';
@@ -164,6 +165,10 @@ export async function bootstrapPortalIntegrationServices({
         env.H5_SCHEDULE_ENABLED === '1'
           ? scheduleService
           : null,
+      scheduledTaskService:
+        env.H5_SCHEDULE_ENABLED === '1'
+          ? scheduledTaskService
+          : null,
       wechatScheduleLlmConfigService,
       llmProviderService,
       chatIntentRouter,
@@ -277,7 +282,7 @@ export async function bootstrapPortalIntegrationServices({
   let scheduledTaskWorker = null;
   if (
     !isPassiveCanaryRuntime(env) &&
-    env.H5_SCHEDULED_TASK_WORKER_ENABLED === '1' &&
+    isScheduledTaskWorkerEnabled(env) &&
     scheduledTaskService &&
     userAuth &&
     tkmindProxy
@@ -295,6 +300,14 @@ export async function bootstrapPortalIntegrationServices({
         logger,
       });
     logger.log('Scheduled task worker enabled');
+  } else if (
+    !isPassiveCanaryRuntime(env)
+    && scheduledTaskService
+    && !isScheduledTaskWorkerEnabled(env)
+  ) {
+    logger.warn?.(
+      'Scheduled task worker disabled: set H5_SCHEDULED_TASK_WORKER_ENABLED=1 or H5_REMINDER_WORKER_ENABLED=1',
+    );
   }
 
   let subscriptionExpiryTimer = null;