Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 tasksource--I2D2/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tasksource--I2D2/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/validation/index.duckdb 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:f44e67b78ce070f3444c4e18e0e7450fb45616b610da18676246fa4a0e5dee3c
+size 1585152