Provide UI controls to manually trigger a full sync across the cluster

NEXUS-18181 will add a health-check to report when a node is out-of-sync with the cluster

This story will look at providing a service and associated UI control to manually trigger a full sync across the cluster. Orient already provides a console command to do this, but most installations won't have the console enabled. We might also be able to be more smart about how much we need to sync. If only a particular cluster (ie. shard) is affected then we only need to do a full sync of that instead of the whole DB.