Update duckdb index files

.gitattributes

@@ -81,3 +81,4 @@ yor/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 yor/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 zul/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 zul/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+zul/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

zul/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0a6b460f83b43165325c6f3bfe178978e9f8918f9abc37c422e1b2fd14843087
+size 1060864