feat: Add network errors to our tracking

nix/base-system/darwin-configuration.nix

@@ -92,7 +92,7 @@
                     ];
                 }
                 {
-                    title = "Network Quality";
+                    title = "Network Latency";
                     query_type = "Range";
                     d3_tick_format = "~s";
                     yaxes = [
@@ -124,6 +124,28 @@
                         }
                     ];
                 }
+                {
+                    title = "Network Errors 5m delta";
+                    query_type = "Range";
+                    d3_tick_format = "~s";
+                    yaxes = [
+                        {
+                            anchor = "y";
+                        }
+                    ];
+                    plots = [
+                        {
+                            source = "http://${config.services.prometheus.listen}";
+                            query = ''
+                                delta(stun_attempt_counter{result="err"}[5m])
+                            '';
+                            config = {
+                                name_format = "`UDP \${labels.domain} failure count`";
+                                yaxis = "y1";
+                            };
+                        }
+                    ];
+                }
                 {
                     title = "Network Traffic Bytes";
                     query_type = "Range";