data: freeze feature-set identity

repro_check/data/feature_set.json

@@ -0,0 +1,8 @@
+{
+  "created_at": "2026-10-05T01:32:22Z",
+  "feature_set_id": "fs-a3b70d8acd",
+  "revisions": {
+    "audio": "4c66d4806a428f2e922ccfa1a962776e232d487b",
+    "video": "dc740ceda42fce44faed2ea03c6d447db72f6af9"
+  }
+}