Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ Joemgu--sumstew/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Joemgu--sumstew/test/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:add88b7bce690960817abd33f74dd544975cac23ff842d0ebaeb3c5844c6d791
+size 3919589376