Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ arithmetic_1dc/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arithmetic_2da/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arithmetic_2dm/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arithmetic_2ds/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+arithmetic_3da/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

arithmetic_3da/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a83aaec74a39c71c0c5b9ddc353aae90aac36f95352c6936a1644a9b00defbac
+size 1323008