Replication-related metrics missing if there aren't any replication jobs
Some of our replication-related metrics don't get seeded with their labels, which means that they won't get populated at all when we don't create replication jobs. While that's fine as the metric will start to appear as soon as there is a job getting created, it still is confusing to administrators if they cannot discover the metric. One of these metrics is e.g. gitaly_praefect_replication_latency_bucket
, but there are likely going to be others.
We should fix this source of confusion by pre-seeding the metrics with all available labels.