A cloud operations team notices their monthly log management bill has tripled over the past quarter. Investigation reveals that developers enabled DEBUG-level logging across all production application tiers to troubleshoot an issue three months ago, and the setting was never reverted. The logs are ingested into a centralized SaaS logging platform that charges per GB ingested and per GB stored. Compliance requires only that transaction audit events and error-level logs be retained for one year. Which action will most effectively reduce cost while preserving required data?