Update duckdb index files

.gitattributes

@@ -59,3 +59,4 @@ KaiLv--UDR_Python/debug/index.duckdb filter=lfs diff=lfs merge=lfs -text
 KaiLv--UDR_Python/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/debug/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 sha256:099c47ae1a9e2c7f36cee6476ec167e9824bbe5990759e672e5e316b04e67c56
+size 185085952