Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 vector--test_demo/imagefolder-train.parquet filter=lfs diff=lfs merge=lfs -text
 vector--test_demo/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 sha256:1816c3bb3d64396fd04c16d054f7bca5b08886cca0da00e835c4c928224192d8
+size 4206592