Update duckdb index files

.gitattributes

@@ -4,3 +4,4 @@ batterydata--cner/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 batterydata--cner/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/test/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:a420836f4c7f5759a12583c64a52658a89061baad341f3d793039356bf6911a3
+size 57159680