A company operates multiple AWS accounts, each with a VPC configured to publish VPC flow logs in text format to a centralized Amazon S3 bucket. These logs are compressed using gzip and must be retained indefinitely. A security engineer periodically uses Amazon Athena to analyze these logs, but performance has declined due to the increasing volume of logs. A solutions architect is tasked with enhancing the log analysis performance and minimizing storage usage. Which solution offers the most significant performance improvement?