Rewrite v30 episodes parquet preserving original row-group layout (text-only change)

data/RoboDojo_lerobot_v30_video/meta/episodes/chunk-000/file-000.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:18061f6622f036a3f74b2f7a7f92ab07ea5fbb070f522836b5f5f2a853ce1215
-size 9667874
+oid sha256:53929b28cb1af833b08d795e5b7adb9901d2b6c79370c10459b47172c240cd23
+size 20481715