fix(network): согласовать GRE PSK с FastPath и экспортом

docs/ux-ui/acceptance/gre212-profile-2026-10-13.json

@@ -0,0 +1,15 @@
+{
+  "date": "2026-10-13",
+  "block": "12.5.212",
+  "commands": [
+    "npm --prefix backend run test:live-maps",
+    "npx tsx lib/gre-export.test.ts",
+    "npx tsx lib/filters-response.test.ts",
+    "npx tsx lib/network-map-response.test.ts"
+  ],
+  "passed": true,
+  "frontendTypecheckPassed": true,
+  "backendBuildPassed": true,
+  "eslintErrors": 0,
+  "scope": "GRE compatibility and export; existing catalog consumers retained"
+}