Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+ARC-Easy/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ARC-Easy/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f30ac15e6cb03683755e7ad18999310e43fe796c2d13bce436d08b82fa993c39
+size 2371584