Add deploy-ready health checks

backend/src/app.ts

@@ -12,6 +12,7 @@ import nodemailer, { type SendMailOptions } from 'nodemailer';
 import Stripe from 'stripe';
 import { z } from 'zod';
 
+import { db } from './db/client.js';
 import { ensureSchema } from './db/schema.js';
 import { adoptionReportQueueEvents, enqueueAdoptionReportJob } from './queues/adoptionReportQueue.js';
 import { enqueueBirdMilestoneReminderJob, getBirdMilestoneReminderQueueCounts } from './queues/birdMilestoneReminderQueue.js';
@@ -2514,6 +2515,24 @@ app.get('/api/health', (_req: Request, res: Response) => {
   res.json({ ok: true });
 });
 
+app.get('/api/health/live', (_req: Request, res: Response) => {
+  res.json({ ok: true, status: 'live' });
+});
+
+app.get('/api/health/ready', async (_req: Request, res: Response) => {
+  try {
+    await Promise.all([
+      db.query('SELECT 1'),
+      getBirdMilestoneReminderQueueCounts(),
+      getMedicationReminderQueueCounts(),
+    ]);
+    res.json({ ok: true, status: 'ready' });
+  } catch (error) {
+    console.error('Readiness check failed', error);
+    res.status(503).json({ ok: false, status: 'not_ready' });
+  }
+});
+
 app.get('/api/metrics', requireAuth, requireAdmin, async (_req: Request, res: Response, next: NextFunction) => {
   const memoryUsage = process.memoryUsage();
   const averageDurationMs = requestMetrics.totalRequests > 0 ? requestMetrics.totalDurationMs / requestMetrics.totalRequests : 0;