Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ generalization--square_Full-p_1/parquet-test.parquet filter=lfs diff=lfs merge=l
 generalization--square_Full-p_1/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 generalization--square_Full-p_1/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 generalization--square_Full-p_1/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+generalization--square_Full-p_1/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

generalization--square_Full-p_1/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5e33714ab8b79bceefc7bca4685ea0b6d560b0d7797e365b1e46db9942183a73
+size 1585152