Enhance protocol blocking service to monitor and update active VPN peer IPs

lib/services/protocol_blocking_service.dart

@@ -91,6 +91,10 @@ class ProtocolBlockingService {
       
       if (_scanCount % 100 == 0) {
         print('🔍 Found ${tcpConnections.length} TCP + ${udpConnections.length} UDP connections');
+        // Debug: show first few connections to see the format
+        if (tcpConnections.isNotEmpty) {
+          print('Debug - First TCP connection: ${tcpConnections.first}');
+        }
       }
       
       for (final conn in [...tcpConnections, ...udpConnections]) {