fix(gre): не подменять неизвестные флаги состоянием туннеля

docs/ux-ui/acceptance/gre220-build-proof-2026-10-14.json

@@ -0,0 +1,23 @@
+{
+  "date": "2026-10-14",
+  "block": "12.5.220",
+  "compiled": {
+    "matched": 1056,
+    "missing": 0,
+    "different": 0
+  },
+  "source": [
+    {
+      "kind": "backend",
+      "matched": 488
+    }
+  ],
+  "profileScripts": {
+    "liveMaps": 14,
+    "configSync": 6,
+    "greFlagCombinations": 49
+  },
+  "optionalDisabledSqlProfileSkipped": true,
+  "productionCases": 30,
+  "initialLocalFixtureFailure": "GRE IPv6 fixture omitted disabled; updated to explicit false, repeated configSync passed"
+}