Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 default/crd3-train.parquet filter=lfs diff=lfs merge=lfs -text
 default/crd3-test.parquet filter=lfs diff=lfs merge=lfs -text
 default/crd3-validation.parquet 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:eec60d03a61d5c625d3d3abeb86648bfd14daf9141e0a961d353810593fc5d1d
+size 110637056