Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 arbml--ARC_WMI/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arbml--ARC_WMI/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet 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 sha256:3e0203011ff6fc377960e6fb2cb4ff44972fd3c125957c9afa1a61d2db61b64f
+size 1060864