Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 metaeval--x-fact/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
 metaeval--x-fact/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 metaeval--x-fact/train/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:ca6fb651dfad18f77fba79b35acbeaa7395ade1e143b6fd82bd1c69fa32fce38
+size 84684800