Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ arbml--APCDv2/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 arbml--APCDv2/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arbml--APCDv2/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 sha256:8b5d25e9e9748d1940e4e96661fa427a43fc7cb1107eefa602e52279e018ce69
+size 81539072