Enable consul metrics.

hosts/common/consul.nix

@@ -14,6 +14,10 @@ in
       server = server_enabled;
       bootstrap_expect = (builtins.length servers + 2) / 2;
       retry_join = builtins.filter (elem: elem != config.networking.hostName) servers;
+      telemetry = {
+        prometheus_retention_time = "24h";
+        disable_hostname = true;
+      };
     };
   };