chore(linear-static-mitc4-shell): step 0 output

phases/linear-static-mitc4-shell/index.json

@@ -5,7 +5,10 @@
     {
       "step": 0,
       "name": "shell-semantic-model",
-      "status": "pending"
+      "status": "error",
+      "started_at": "2026-08-12T17:50:02+0900",
+      "error_message": "[3회 시도 후 실패] Step did not update status",
+      "failed_at": "2026-08-12T18:14:21+0900"
     },
     {
       "step": 1,
@@ -72,5 +75,6 @@
       "name": "shell-reference-comparison",
       "status": "pending"
     }
-  ]
+  ],
-}
+  "created_at": "2026-08-12T17:50:02+0900"
+}