feat(paths): enforce fifth-domain physical redirects

routing/lighthouse-path-registry.json

@@ -2,7 +2,7 @@
   "schema": "guanghu.lighthouse-path-registry/v1",
   "registry_id": "GLW-LIGHTHOUSE-PATH-REGISTRY-001",
   "lighthouse_id": "SYS-GLW-LTH-0001",
-  "version": "2026-09-09.7-private-public-channel-separation-local",
+  "version": "2026-09-12.8-fifth-domain-physical-path-redirect",
   "state": "CURRENT_CANONICAL",
   "source_repository": "REPO-012",
   "source_branch": "main",
@@ -692,9 +692,23 @@
       "online": "routing/persona-body-organ-treatment-map.json",
       "activation": "SYMPTOM_RECEIPT_ONLY",
       "authority": "DIAGNOSIS_READ_ONLY_MUTATION_REQUIRES_CURRENT_TASK_AND_HOST_GATE"
+    },
+    {
+      "id": "HB-BUILDING-0001",
+      "kind": "heartbeat_current_office_building",
+      "state": "CURRENT",
+      "online": "eternal-lake-heart/heartbeat-core/office-building-current/BUILDING-INDEX.hdlp",
+      "physical_path_gate": "server-tools/fifth-domain-path-gate/fifth-domain-path-gate.mjs",
+      "old_building": "HB-BUILDING-0000_REDIRECT_ONLY"
     }
   ],
   "redirects": [
+    {
+      "id": "HB-BUILDING-0000",
+      "state": "MOVED_REDIRECT_ONLY",
+      "redirect_to": "HB-BUILDING-0001",
+      "reason": "The old heartbeat office building is physically retired; history moved to records/retired-buildings/HB-BUILDING-0000."
+    },
     {
       "id": "REPO-001",
       "state": "HISTORICAL_REDIRECT_ONLY",