Unify ARCTIC shared-v1.0 batch 429

.gitattributes

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+{
+  "schema_version": "hand-warehouse/1.0",
+  "storage_revision": "lossless-video-2026-09-18",
+  "dataset_id": "ARCTIC",
+  "release_id": "shared-v1.0",
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+    "source_fps_reason": "Actual capture FPS not asserted by the selected raw files; frame indices and official synchronization offset retained"
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+          "source_color_declaration": "unknown",
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+      "storage_fps": 1,
+      "timebase_role": "index_only"
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+    "sequence": "s10/capsulemachine_use_02"
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+  "omitted_components": {
+    "depth": "No depth images in this official raw release",
+    "segment": "No pixel segmentation in this official raw release",
+    "contact": "No source contact labels in selected official raw packages",
+    "keypoints": "No separate measured hand keypoints in raw; MANO available. Render-only joints are not published as additional labels",
+    "visibility": "Not supplied in selected raw annotations; fitting_err is outside current shared scope"
+  },
+  "media_validation_policy": "jpeg-packets-all-rgb-sample16/v1",
+  "pilot_complete": true,
+  "production_complete": true,
+  "pilot_human_review": "approved",
+  "full_output_human_review": "pending",
+  "upload_authorized": false
+}

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+      "schema_id": "rgb/uint8/v1",
+      "data_ref": "observation/rgb.mkv",
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+    "segment": "No pixel segmentation in this official raw release",
+    "contact": "No source contact labels in selected official raw packages",
+    "keypoints": "No separate measured hand keypoints in raw; MANO available. Render-only joints are not published as additional labels",
+    "visibility": "Not supplied in selected raw annotations; fitting_err is outside current shared scope"
+  },
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+  "pilot_complete": true,
+  "production_complete": true,
+  "pilot_human_review": "approved",
+  "full_output_human_review": "pending",
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