- Implemented a function to create a valid SQLite database for testing in db_health_handler_test.go.
- Replaced dummy database file creation with a proper SQLite setup to ensure tests run against a valid database.
- Set CHARON_ENCRYPTION_KEY environment variable in dns_provider_service_test.go to prevent RotationService initialization warnings.
- Added detailed remediation plan for CI Codecov backend test failures, addressing encryption key requirements and database record not found errors.