test(ads): [PKG-ADS-02] cover legacy timing and real media contracts

refactor/tasks.json

@@ -2545,11 +2545,15 @@
         "ENG-03",
         "ENG-05"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "H",
       "deliverable": "固定 npm 1.0.6 与工作区契约；HTML/视频/图片 HTML、跳过阈值、计时链、工厂复用、多实例、过早/重复方法、播放拒绝与销毁",
       "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-ADS-02-tests.md",
+        "ads-validation.md",
+        "baselines/ads-validation.json"
+      ]
     },
     {
       "id": "PKG-ADS-03",