Update duckdb index files

.gitattributes

@@ -68,3 +68,4 @@ in_center_single_out_center_single/validation/index.duckdb filter=lfs diff=lfs m
 in_distribute_four_out_center_single/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 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/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:678d4bed85ea209f1e9368e7af92540972b0fbdaad3715575056196f6787da7b
+size 147075072