Replace direct defers that ignored returned errors with explicit defer func() { _ = ... }() and use blank-assignment for Setenv/RemoveAll/Close to satisfy error-checking and ensure closures run. Convert several if-else chains to switch for clarity (status filter, test server path matching), switch strings.Replace to strings.ReplaceAll, and normalize some error/log message casing. These changes are minor refactors across handlers, services, database and tests to improve lint compliance and readability.
