Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ arbml--ArCovidVac/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 arbml--ArCovidVac/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arbml--ArCovidVac/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 sha256:551e3da3cb2c16ebf9f4cb22a81c772dd32d24398dc9dd3bbf7096a125792255
+size 2371584