chore: relocate backend into apps/api ahead of monorepo merge

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/api/tests/cron/fail_stale_payments.test.js

@@ -0,0 +1,40 @@
+'use strict';
+
+jest.mock('../../models/tiers/payments.mdl', () => ({ findAll: jest.fn() }));
+jest.mock('../../models/courses/course_purchases.mdl', () => ({ findAll: jest.fn() }));
+
+const mdl_Payments       = require('../../models/tiers/payments.mdl');
+const mdl_CoursePurchase = require('../../models/courses/course_purchases.mdl');
+const job                = require('../../cron/jobs/fail_stale_payments.cron');
+
+beforeEach(() => jest.clearAllMocks());
+
+test('marks stale pending payments and purchases as failed', async () => {
+  const payment = { provider_payload: { order_id: 'O-1' }, update: jest.fn().mockResolvedValue(true) };
+  const purchase = { provider_payload: { order_id: 'O-2' }, update: jest.fn().mockResolvedValue(true) };
+
+  mdl_Payments.findAll.mockResolvedValue([payment]);
+  mdl_CoursePurchase.findAll.mockResolvedValue([purchase]);
+
+  await job.run();
+
+  expect(payment.update).toHaveBeenCalledWith(
+    expect.objectContaining({
+      status: 'failed',
+      provider_payload: expect.objectContaining({ failed_reason: 'abandoned_checkout' }),
+    })
+  );
+  expect(purchase.update).toHaveBeenCalledWith(
+    expect.objectContaining({
+      status: 'failed',
+      provider_payload: expect.objectContaining({ failed_reason: 'abandoned_checkout' }),
+    })
+  );
+});
+
+test('does nothing when there are no stale rows', async () => {
+  mdl_Payments.findAll.mockResolvedValue([]);
+  mdl_CoursePurchase.findAll.mockResolvedValue([]);
+
+  await expect(job.run()).resolves.not.toThrow();
+});