feat(monitoring): add frontend and backend protocol distribution metrics to network stats

ts/monitoring/classes.metricsmanager.ts

@@ -591,6 +591,11 @@ export class MetricsManager {
       const requestsPerSecond = proxyMetrics.requests.perSecond();
       const requestsTotal = proxyMetrics.requests.total();
 
+      // Get frontend/backend protocol distribution (available in SmartProxy >= next release)
+      const conn = proxyMetrics.connections as any;
+      const frontendProtocols = conn.frontendProtocols?.() ?? null;
+      const backendProtocols = conn.backendProtocols?.() ?? null;
+
       // Collect backend protocol data
       const backendMetrics = proxyMetrics.backends.byBackend();
       const protocolCache = proxyMetrics.backends.detectedProtocols();
@@ -705,6 +710,8 @@ export class MetricsManager {
         requestsPerSecond,
         requestsTotal,
         backends,
+        frontendProtocols,
+        backendProtocols,
       };
     }, 1000); // 1s cache — matches typical dashboard poll interval
   }