The header of this file always said 2 instances while the spec said 3. The
third never ran: gotify-db-3's volume held a single replica that could not
start, because talos-cp-2 disk2 is at 2.9% free. That left the cluster
permanently in 'Creating a new replica' with one degraded Longhorn volume.
Two replicas on two different nodes is the redundancy that actually exists.