feat(monitoring): add backend protocol metrics to network stats and ops dashboard

ts/opsserver/handlers/stats.handler.ts

@@ -309,6 +309,7 @@ export class StatsHandler {
                   throughputHistory: stats.throughputHistory || [],
                   requestsPerSecond: stats.requestsPerSecond || 0,
                   requestsTotal: stats.requestsTotal || 0,
+                  backends: stats.backends || [],
                 };
               })()
             );