Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ Rosenberg--CMeIE/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rosenberg--CMeIE/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rosenberg--CMeIE/validation/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 sha256:3ca6e00d155ebcd435784cf9f0e93891da42e475108d8e150dbf698cf8054dfc
+size 6565888