Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 VXX--sd_images/imagefolder-train.parquet filter=lfs diff=lfs merge=lfs -text
 VXX--sd_images/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 sha256:6997bef73828a9ce0a43c66d5e44e8308875ed8c071ca8ae2b6d318cf109a897
+size 2371584