Update duckdb index files

.gitattributes

@@ -99,3 +99,4 @@ default/random_4_train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/random_4_val/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/random_4_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/scaffold_0_train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/scaffold_0_val/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/scaffold_0_val/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:947bcaed06623b55165c7799407fcc96a02711c402e8148235f86116947ffd53
+size 1060864