fix(notifications): replace Cloud Run job with worker service

backend/command-api/src/worker-app.js

@@ -0,0 +1,46 @@
+import express from 'express';
+import pino from 'pino';
+import pinoHttp from 'pino-http';
+
+const logger = pino({ level: process.env.LOG_LEVEL || 'info' });
+
+export function createWorkerApp({ dispatch = async () => ({}) } = {}) {
+  const app = express();
+
+  app.use(
+    pinoHttp({
+      logger,
+    })
+  );
+  app.use(express.json({ limit: '256kb' }));
+
+  app.get('/health', (_req, res) => {
+    res.status(200).json({ ok: true, service: 'notification-worker-v2' });
+  });
+
+  app.get('/readyz', (_req, res) => {
+    res.status(200).json({ ok: true, service: 'notification-worker-v2' });
+  });
+
+  app.post('/tasks/dispatch-notifications', async (req, res) => {
+    try {
+      const summary = await dispatch();
+      res.status(200).json({ ok: true, summary });
+    } catch (error) {
+      req.log?.error?.({ err: error }, 'notification dispatch failed');
+      res.status(500).json({
+        ok: false,
+        error: error?.message || String(error),
+      });
+    }
+  });
+
+  app.use((_req, res) => {
+    res.status(404).json({
+      code: 'NOT_FOUND',
+      message: 'Route not found',
+    });
+  });
+
+  return app;
+}

backend/command-api/src/worker-server.js

@@ -0,0 +1,12 @@
+import { createWorkerApp } from './worker-app.js';
+import { dispatchPendingNotifications } from './services/notification-dispatcher.js';
+
+const port = Number(process.env.PORT || 8080);
+const app = createWorkerApp({
+  dispatch: () => dispatchPendingNotifications(),
+});
+
+app.listen(port, () => {
+  // eslint-disable-next-line no-console
+  console.log(`krow-notification-worker listening on port ${port}`);
+});

backend/command-api/test/notification-worker.test.js

@@ -0,0 +1,47 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import request from 'supertest';
+import { createWorkerApp } from '../src/worker-app.js';
+
+test('GET /readyz returns healthy response', async () => {
+  const app = createWorkerApp();
+  const res = await request(app).get('/readyz');
+
+  assert.equal(res.status, 200);
+  assert.equal(res.body.ok, true);
+  assert.equal(res.body.service, 'notification-worker-v2');
+});
+
+test('POST /tasks/dispatch-notifications returns dispatch summary', async () => {
+  const app = createWorkerApp({
+    dispatch: async () => ({
+      claimed: 2,
+      sent: 2,
+    }),
+  });
+
+  const res = await request(app)
+    .post('/tasks/dispatch-notifications')
+    .send({});
+
+  assert.equal(res.status, 200);
+  assert.equal(res.body.ok, true);
+  assert.equal(res.body.summary.claimed, 2);
+  assert.equal(res.body.summary.sent, 2);
+});
+
+test('POST /tasks/dispatch-notifications returns 500 on dispatch error', async () => {
+  const app = createWorkerApp({
+    dispatch: async () => {
+      throw new Error('dispatch exploded');
+    },
+  });
+
+  const res = await request(app)
+    .post('/tasks/dispatch-notifications')
+    .send({});
+
+  assert.equal(res.status, 500);
+  assert.equal(res.body.ok, false);
+  assert.match(res.body.error, /dispatch exploded/);
+});