A digital publishing platform stores large volumes of media assets (such as images and documents) in an Amazon S3 bucket. These assets are accessed frequently during business hours by internal editors and content delivery tools. The company has strict encryption policies and currently uses AWS KMS to handle server-side encryption. The cloud operations team notices that AWS KMS request costs are increasing significantly due to the high frequency of object uploads and accesses. The team is now looking for a way to maintain the same encryption method but reduce the cost of KMS usage, especially for frequent access patterns. Which solution meets the company's encryption and cost optimization goals?