ListRepositories RPC to verify project replication during demos
Problem to solve
During Gitaly HA demos it is laborious to verify if a change got replicated.
If an administrator was debugging Praefect, they would have no way to quickly check the state of all replicas.
Proposal
Add a command to Praefect to allow an administrator to quickly verify the checksum of all the nodes for a specific project.
Edited  by John Cai