Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 tasksource--faviq/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tasksource--faviq/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5ba2366734c8ac63f834019a8bd806dbe49e6a31f94012555c988e159e4fc74b
+size 17838080