Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ Rosenberg--CMeEE/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rosenberg--CMeEE/train/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:ed672d8e4308d2221391ab553c11eaf4626a1fa69f000f3680b4854a203f1ba6
+size 2633728