fix(network-proxy/websocket): Improve WebSocket connection closure and update router integration

test/test.networkproxy.ts

@@ -238,6 +238,10 @@ tap.test('should start the proxy server', async () => {
         },
         tls: {
           mode: 'terminate'
+        },
+        websocket: {
+          enabled: true,
+          subprotocols: ['echo-protocol']
         }
       }
     }