Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ renyulin--test_ds/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 renyulin--test_ds/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 renyulin--test_ds/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:623037c72f710a264ea451254c605a9ee470076c826d7544397d05a3c8d0182d
+size 2633728