test(vast): [PKG-VAST-02] cover SDK failures and lifecycle races

refactor/tasks.json

@@ -2669,11 +2669,16 @@
         "ENG-03",
         "ENG-05"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "H",
       "deliverable": "SDK 失败、重复初始化、广告事件、内容恢复和销毁竞态；发布 id/$container/eager 与工作区 lazy/config 覆盖、callback拒绝、加载中销毁、同毫秒多实例与晚到事件",
       "acceptance": "旧版本行为可重跑，成功/失败/切源/销毁有必要断言",
-      "evidence": []
+      "evidence": [
+        "changes/2026-09-12-PKG-VAST-02-tests.md",
+        "baselines/vast-behavior-validation.json",
+        "baselines/vast-core.json",
+        "vast-validation.md"
+      ]
     },
     {
       "id": "PKG-VAST-03",