Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 VXX--images/imagefolder-train.parquet filter=lfs diff=lfs merge=lfs -text
 VXX--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 sha256:5a6334c0c523281aafd94ea4eb140c0015ed3477ded20ee3118349e4b434a277
+size 2371584