docs(site): [SITE-04] document PiP and ASR contracts in both languages

refactor/tasks.json

@@ -4558,7 +4558,9 @@
       "evidence": [
         "site-content-review.md",
         "changes/2026-09-16-SITE-04-chapter-ambilight-guides.md",
-        "baselines/site04-chapter-ambilight-guides.json"
+        "baselines/site04-chapter-ambilight-guides.json",
+        "changes/2026-09-16-SITE-04-dpip-asr-guides.md",
+        "baselines/site04-dpip-asr-guides.json"
       ]
     },
     {