Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ binary/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 intensity/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/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:d12754ded119a322b765964af355f440d6c806e43e1e594b0b24d4c1e2f7cc6f
+size 1323008