Check invalid scheduled mirror worker status in production

ids = [1008371, 1026896, 1043252, 1077848]
import_jids = Project.where(id: ids).map(&:import_jid)

Gitlab::SidekiqStatus.completed_jids(import_jids)

This is related to https://gitlab.com/gitlab-org/gitlab-ee/issues/3608#note_42250785

\cc @pcarranza @DouweM