Freeze independent English German speech and boundary validation inputs

fixtures/speech-validation-v1/seam-plan.json

@@ -0,0 +1,23 @@
+{
+  "schema": 1,
+  "frozen_before_inference": true,
+  "purpose": "Artificial repeat/offset primitive stress, separate from4clipretrievalpool; no sentence-precise labels",
+  "policy": "ReferencefullsourceVAD versus independent30s VAD windows with2s overlap; no parityassumption or postscore parameter tuning",
+  "recipes": [
+    {
+      "id": "seam-en",
+      "source": "speech-en",
+      "copies": 2,
+      "prefix_silence_ms": 5000,
+      "maximum_duration_ms": 45000
+    },
+    {
+      "id": "seam-de",
+      "source": "speech-de",
+      "copies": 3,
+      "prefix_silence_ms": 5000,
+      "maximum_duration_ms": 45000
+    }
+  ],
+  "acceptance": "Report sourcecoverage/intervalmembership disagreement, boundary omissions/duplicates and cancellation/failure before publication; map padding exactlyonce, preserve known source offsets and no label-selected speech interval. Any whole-file probability difference is a finding, not automaticallya correctnesserror; functional acceptance requires no missing sourcewindows, validbounds and independently assessed speechrecall. Human finephoneme labels unavailable; do not claim precise localizedquality."
+}