Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ tasksource--VUAC/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tasksource--VUAC/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tasksource--VUAC/validation/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:dbcdae185302b73660f85d278977857b2a1a9367d98ba902c147aa5fbf5d4b90
+size 1585152