Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 cw1521--ember2018/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cw1521--ember2018/partial-test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/partial-test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:54c0a9ad3d7151cf923de44dd182ed7a0f10bac20aff654641f5c86697d96e7b
+size 1645752320