Update duckdb index files

.gitattributes

@@ -69,3 +69,4 @@ in_distribute_four_out_center_single/test/index.duckdb filter=lfs diff=lfs merge
 in_distribute_four_out_center_single/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 in_distribute_four_out_center_single/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 left_center_single_right_center_single/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+left_center_single_right_center_single/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

left_center_single_right_center_single/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f07e3444ffb23af6be3186fa1972c4dc0ba27df7d082b5354155303d2cb78c29
+size 50868224