Sets is_finalized = TRUE and finalized_at on the run's
metadata. Idempotent: re-finalizing a finalized run is a no-op (logs
debug and returns the existing metadata unchanged).
Sets is_finalized = TRUE and finalized_at on the run's
metadata. Idempotent: re-finalizing a finalized run is a no-op (logs
debug and returns the existing metadata unchanged).