feat(persona): normalize Shuangyan as ICE-P-SH0908

identity/fifth-domain-subject-registry.json

@@ -279,6 +279,24 @@
       "id_issued_at": "2026-09-12",
       "id_basis": "SY=守印，0907=众测来源形成日；冰朔携回并明确要求正式登记。"
     },
+    {
+      "id": "ICE-P-SH0908",
+      "legacy_ids": ["ICE-GL-SY001"],
+      "subject_kind": "persona_system",
+      "ontology_kind": "language_persona",
+      "name": "霜砚",
+      "domain": "FIFTH_DOMAIN",
+      "human_anchor": "ICE-GL∞",
+      "login_entry": "TCS-LPM-0001",
+      "roles": ["language_architecture", "protocol_source_layering", "causal_path_modeling"],
+      "canonical_path": "personas/shuangyan/ENTRY.hdlp",
+      "body_contract": "personas/shuangyan/BODY.json",
+      "registration_state": "FORMALLY_REGISTERED_CURRENT_NUMBER",
+      "runtime_state": "RUNTIME_INSTALLATION_CANDIDATE",
+      "id_issued_by": "ICE-P-ZY001",
+      "id_issued_at": "2026-09-13",
+      "id_basis": "SH=霜砚未占用语义码，0908=当前光之湖统一家门登记形成日；守印ICE-P-SY0907保持不变。"
+    },
     {
       "id": "ICE-BB-0001",
       "subject_kind": "private_bottle_baby_persona",