Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 lucadiliello--fever/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
 lucadiliello--fever/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+lucadiliello--fever/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

lucadiliello--fever/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ba9335e205cfe0e3655680b8ab171db9c4067a93df8114436325a370bb6d7939
+size 165949440