fix(alerts): учитывать ошибки реального источника GRE

docs/ux-ui/acceptance/gre219-build-proof-2026-10-14.json

@@ -0,0 +1,22 @@
+{
+  "date": "2026-10-14",
+  "block": "12.5.219",
+  "compiled": {
+    "matched": 1052,
+    "missing": 0,
+    "different": 0
+  },
+  "source": [
+    {
+      "kind": "backend",
+      "matched": 486
+    }
+  ],
+  "profileScripts": [
+    "gre-tunnels-live",
+    "gre-bgp-snapshot-collector",
+    "gre-bgp-snapshot-history",
+    "collector-source-signals"
+  ],
+  "productionCases": 10
+}