test: ENG-03 share behavior fixtures across source and releases

refactor/tasks.json

@@ -492,11 +492,13 @@
         "ENG-02",
         "BASE-03"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "M",
       "deliverable": "保留现有 node:test，测试目录/夹具/统一入口",
       "acceptance": "已有 19 项回归保留，旧版与候选可用同一夹具运行",
-      "evidence": []
+      "evidence": [
+        "changes/2026-09-10-ENG-03-unit-entry.md"
+      ]
     },
     {
       "id": "ENG-04",