Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ Gae8J--modeling/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Gae8J--modeling/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/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 sha256:4d5a227a2142e45edaef3d21662bcfb4517e1c632e0aa4bb3c85d2e232e29869
+size 277884928