A car rental company has developed a serverless REST API using Amazon API Gateway, AWS Lambda functions, and an Amazon Aurora MySQL Serverless DB cluster to serve its mobile app. Recently, the API was opened to partner mobile apps, leading to a significant increase in request volume and sporadic database memory errors. Traffic analysis shows that clients frequently make multiple identical HTTP GET requests within short intervals, with peak usage during business hours and around holidays. The company seeks a strategy to enhance support for this increased usage while minimizing additional costs. Which approach should the company adopt?