Alert when a replication slot is being unused for too long
From https://gitlab.com/gitlab-org/gitlab-ee/issues/4434, we need to ship a PostgreSQL alert with AlertManager that notifies an admin when a replication slot is being unused for too long.
From https://gitlab.com/gitlab-org/gitlab-ee/issues/4434, we need to ship a PostgreSQL alert with AlertManager that notifies an admin when a replication slot is being unused for too long.