Update duckdb index files

.gitattributes

@@ -66,3 +66,4 @@ cs/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_zh/sampled_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ar_cs/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ar_cs/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:56d8c055e1eec2996d5a93b09aca82a22123134656b60037d26bf9e467aaac7c
+size 24129536