fix: 增加 /api/v1/health 路由，修复 deploy.sh 验证 404

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backend/src/app.ts

@@ -35,6 +35,11 @@ app.get('/health', (_req, res) => {
   res.json({ success: true, data: { status: 'ok', timestamp: new Date().toISOString() } })
 })
 
+// deploy.sh 验证脚本检查 /api/v1/health
+app.get('/api/v1/health', (_req, res) => {
+  res.json({ success: true, data: { status: 'ok', timestamp: new Date().toISOString() } })
+})
+
 app.use('/api/v1', apiLimiter)
 
 // 路由挂载