Update duckdb index files

.gitattributes

@@ -44,3 +44,4 @@ tokeron--Piyyut/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tokeron--Piyyut/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 sha256:0b50b76bf39d161afc3f89c234ec5b53a62a4612f775b8ad071c0f2a0d2362c1
+size 1847296