fix(traffic): проверять live-срез и прекращать опрос выключенных устройств

docs/ux-ui/acceptance/traffic-live-native-2026-10-12.json

@@ -0,0 +1,32 @@
+{
+  "date": "2026-10-12",
+  "block": "12.5.179",
+  "version": "1.0.0-test.live179",
+  "method": "Two actual application TCP SSE GET streams; native interface GET and monitor-traffic read-only POST; stop after first confirmed point",
+  "cases": [
+    {
+      "sourceId": 1,
+      "sample": {
+        "rxMbps": 0.031584,
+        "txMbps": 0.002016,
+        "at": "2026-10-12T14:31:58.084Z",
+        "timestampKind": "backend-receipt"
+      },
+      "streamStatus": 200
+    },
+    {
+      "sourceId": 2,
+      "sample": {
+        "rxMbps": 0.002112,
+        "txMbps": 0.002112,
+        "at": "2026-10-12T14:31:58.237Z",
+        "timestampKind": "backend-receipt"
+      },
+      "streamStatus": 200
+    }
+  ],
+  "routerConfigWrites": 0,
+  "passwordChanges": 0,
+  "messages": 0,
+  "passed": true
+}