Update duckdb index files

.gitattributes

@@ -52,3 +52,4 @@ 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
+pietrolesci--pubmed-20k-rct/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

pietrolesci--pubmed-20k-rct/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:418cea9f41678b655219813a77f08ddb14d97860174d1d83a801b5cb17992604
+size 1391210496