Tidy blank line before RecordSeriesFailure (#165)

backend/internal/store/store.go

@@ -1297,6 +1297,7 @@ func (s *Store) LaneGates(site string) (pausedUntil, refuseUntil int64, err erro
 	}
 	return pausedUntil, refuseUntil, nil
 }
+
 // RecordSeriesFailure upserts one Series' failure row: the outcome word is
 // updated when it changes, failing_since is never overwritten, and an
 // unchanged word writes nothing. One statement, so the identical-word no-op