Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 vesteinn--FC3/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 vesteinn--FC3/validation/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 sha256:43c1ec6a0a4ed353e6dd9e36f45157055e56d305825f2d8e87b6a92b4e5afb3d
+size 17838080