Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 obokkkk--NMT_test/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 obokkkk--NMT_test/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 sha256:14b09c2d52a8c4a0dce05cdf8dd6cd6f0ee9da7643bbd35ff7f67409f894d970
+size 1847296