Update duckdb index files

.gitattributes

@@ -119,3 +119,4 @@ Numersense_structured/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Numersense_structured/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 addsub/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 addsub/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+addsub/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

addsub/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:12b69ea76f8085a879e36fcf2b73c3b52019298baa77eca16fb08209a0a79c2f
+size 1060864