Freeze unseen music stress corpus and independently verified gated DTW experiment

tools/speech-vad/gated-dtw-policy.json

@@ -0,0 +1,13 @@
+{
+  "schema": 1,
+  "policy": "gated-dtw-v1;frozen-silero-source-intersections;dtw-token-sentences-v1;all-five-sources",
+  "vad_report_sha256": "093be2005b57fe16a8f85161cc9da8966e70e2050cf19fa4122531e304dd70df",
+  "vad_worker_sha256": "28746d770ed470d13475d9474fcd37f28c38c39f27da09219bf9a15eef2adb19",
+  "asr_worker_sha256": "12c681b4bcd9c7679b647b9a041e121a2f9e72cb2a9c6f189f529ec8b79c36f8",
+  "dtw_policy_sha256": "0ea19b1a2ee9da75f0284de33aeca0fcdff0a77d88d232b0b25821a7115b83b5",
+  "dtw_contract_sha256": "61594d0e77c561d5d3b7c9e63178a8123841516b8f8fa781458b21ab717ad47f",
+  "ordinary_contract_sha256": "aac049c5bf3e17b07f4f2f7d92bce18c27aef5a67364181e47815301e75ca520",
+  "sources": ["clip04", "music01", "music02", "sound01", "sound02"],
+  "rules": "Unchanged frozen VAD decisions/windows; explicit no-speech rows launch no ASR; retained original raw audio retrieval is unchanged; no labels select speech intervals or suppress sources",
+  "production_default": false
+}