feat(lighthouse): register trusted manifest signers

routing/public-navigation-anchor.json

@@ -1,7 +1,7 @@
 {
   "schema": "guanghu.public-navigation-anchor/v1",
   "anchor_id": "GLW-PUBLIC-NAV-ANCHOR-001",
-  "version": "2026-08-09.3",
+  "version": "2026-08-09.4",
   "state": "CURRENT_CANONICAL",
   "repository_id": "REPO-012",
   "branch": "main",
@@ -64,6 +64,11 @@
       "path": "skills/codex/guanghu-persona-skill-guard/references/persona-skill-registry.json",
       "id": "GLS-0238",
       "version": "2026.08.07.7"
+    },
+    "trusted_domain_manifest_signers": {
+      "path": "routing/trusted-domain-manifest-signers.json",
+      "id": "GH-AIOS-TRUSTED-DOMAIN-MANIFEST-SIGNERS-001",
+      "version": "1.0.0"
     }
   },
   "update_contract": {