Update duckdb index files

.gitattributes

@@ -59,3 +59,4 @@ 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/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:19f6080b467fa6cad0d540d957d3d3364105fb7641a0e6c121c973374b6623f7
+size 61616128