Update duckdb index files

.gitattributes

@@ -41,3 +41,4 @@ test.json filter=lfs diff=lfs merge=lfs -text
 train.json filter=lfs diff=lfs merge=lfs -text
 raw/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 raw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+raw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

raw/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:37ab7a61dfc8ab59a706a5722212acc0aedebd79e68bca2ca026fe351b156661
+size 1077424128