Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ SCI_val.csv filter=lfs diff=lfs merge=lfs -text
 Rahmaa--SCI_Clean/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rahmaa--SCI_Clean/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rahmaa--SCI_Clean/train/index.duckdb 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 sha256:5efa33a8eb398987679ee6021b95b721f91641822c525d4c6d324229638193f0
+size 427307008