Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ arbml--RES2/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arbml--RES2/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 arbml--RES2/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 sha256:9bb89f0e40952ecc3f5d4e17331af4693c554e5e5b09cfbfe1ec23147d21002d
+size 2371584