docs(ci): [CI-01] record complete WebKit source regression

refactor/risks.json

@@ -3001,11 +3001,13 @@
         "refactor/changes/2026-09-15-CI-01-subtitles-installed.md",
         "refactor/baselines/ci-subtitles-installed-validation.json",
         "refactor/changes/2026-09-15-PKG-AUDIO-05-prefix.md",
-        "refactor/baselines/audio-prefix-validation.json"
+        "refactor/baselines/audio-prefix-validation.json",
+        "refactor/changes/2026-09-15-CI-01-source-webkit.md",
+        "refactor/baselines/ci-source-webkit-validation.json"
       ],
       "compatibleResolution": "保留真实 waiting 断言；使用独立原生对照和其他实际支持环境/输入继续验证，不将没有播放推进的诊断当成缓冲通过，也不凭此改变插件 API 或否定真实 Safari 支持。",
       "closureCriteria": "受影响的缓冲/恢复得到真实媒体证据；与原生能力和测试夹具差异分开，发布环境的剩余范围经显式处理。",
-      "workspaceState": "CI-01 九包安装扩展的首轮 336 项中，Windows WebKit 八项新旧音频受限媒体组合继续失败。七项未观察到目标可信 waiting，一项受限视频路径耗尽整体时间并在最终状态读取中报页面关闭。其他引擎均通过；保留原始失败，不以销毁后状态反推初始解码错误，不推断新的共同底层原因。 Same-file prefix controls now show Windows WebKit can start before releasing the tail with larger prefixes (video188653/audio65536), but four committed native diagnostics still record no trusted waiting. Default three-engine diagnostics retain Chromium/Firefox8 progression+waiting and WebKit4 no progression/no waiting. Before-release request copies distinguish held bytes from final sent counters; no production fix or waiver."
+      "workspaceState": "CI-01 九包安装扩展的首轮 336 项中，Windows WebKit 八项新旧音频受限媒体组合继续失败。七项未观察到目标可信 waiting，一项受限视频路径耗尽整体时间并在最终状态读取中报页面关闭。其他引擎均通过；保留原始失败，不以销毁后状态反推初始解码错误，不推断新的共同底层原因。 Same-file prefix controls now show Windows WebKit can start before releasing the tail with larger prefixes (video188653/audio65536), but four committed native diagnostics still record no trusted waiting. Default three-engine diagnostics retain Chromium/Firefox8 progression+waiting and WebKit4 no progression/no waiting. Before-release request copies distinguish held bytes from final sent counters; no production fix or waiver. Complete WebKit source run ae56937d3: all eight initial dual-clock assertions pass, then all eight fail the original trusted waiting/time>0.3 assertion at line30. Seven record no waiting; one has only a trusted time0 event. Held prefixes remain96KiB/32KiB. Recovery assertions are not reached; no production fix or waiver."
     },
     {
       "id": "CHAPTER-LAYOUT-01",
@@ -5814,7 +5816,9 @@
       ],
       "evidence": [
         "refactor/changes/2026-09-14-PKG-JASSUB-02-failure-baseline.md",
-        "refactor/baselines/jassub-failures-validation.json"
+        "refactor/baselines/jassub-failures-validation.json",
+        "refactor/changes/2026-09-15-CI-01-source-webkit.md",
+        "refactor/baselines/ci-source-webkit-validation.json"
       ],
       "compatibleResolution": "Investigate native frame delivery and establish a compatible capability response; explicit event-clock success is diagnostic only.",
       "closureCriteria": "Default native behavior is verified or an explicit reviewed environment limitation is recorded; no silent global fallback or substitution of diagnostic mode for default acceptance.",