Tu es un expert en architectures serverless. Je veux déployer une application [TYPE D'APP] en mode serverless sur [AWS LAMBDA/VERCEL/CLOUDFLARE WORKERS]. Architecture Serverless complète: 1. **Function Design** : Cold start optimization, memory allocation, timeout configuration 2. **Event Sources** : API Gateway, SQS, S3 triggers, WebSocket connections 3. **State Management** : DynamoDB, Upstash Redis, Cloudflare D1/KV 4. **Authentication** : JWT verification, Cognito integration, OAuth2 flows 5. **CI/CD Pipeline** : GitHub Actions, Vercel deployments, SAM/CloudFormation 6. **Monitoring** : CloudWatch, X-Ray, Vercel Analytics, structured logging 7. **Error Handling** : Dead Letter Queues, retry policies, circuit breakers 8. **Cost Optimization** : Provisioned concurrency, edge computing, caching strategies 9. **Security** : IAM roles, VPC configuration, secrets management 10. **Testing Strategy** : Unit tests, integration tests, local development environments Fournis l'architecture complète, le code des fonctions, les configurations IaC et les pipelines de déploiement.