Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ taln-ls2n--SSI/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 taln-ls2n--SSI/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 taln-ls2n--SSI/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:d070e635d5916df7f3bd6192c0919a8a51e15e636d192277de18c7b55ad28192
+size 1060864