Update duckdb index files

.gitattributes

@@ -66,3 +66,4 @@ pl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pl/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pl/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+pt/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

pt/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:456c16f02bcb4130ddee099396948ab44771a683cda1049b244a4751655e74de
+size 3420160