Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 eo22-unified-splitted.txt filter=lfs diff=lfs merge=lfs -text
 ep22-unified-splitted.txt filter=lfs diff=lfs merge=lfs -text
 mp22-unified-splitted.txt 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:c27aafb49579307179d04f19bc73d44a288931df1644b4e83c34bf5ad62fee67
+size 4343476224