Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ yonesuke--Vicsek/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 yonesuke--Vicsek/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 yonesuke--Vicsek/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c3252fcca5b6a438722abaa05635d0cdc1b4681d4a6d4edb3e4b8d71ba2bb6bc
+size 241971200