Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ 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_3ds/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+arithmetic_4da/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

arithmetic_4da/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:802b656ebfc31072c134331270c9330a73927f89dbab54343acc976bdf68f346
+size 1323008