Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 rlatmddus159--ex/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 rlatmddus159--ex/train/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:e67fccd370d01a44f04a51bdafd18f7c3240d7abf0437c3a1f1d5b56f6c038a6
+size 2633728