Update duckdb index files

.gitattributes

@@ -123,3 +123,4 @@ default/validationother/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/testclean/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/testother/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/trainclean100/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/validationclean/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/validationclean/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8aceaa2d02792b0e2bbaec66e2d446ada6c0c9ccfb2049fa93c39c5308960aca
+size 17051648