Update duckdb index files

.gitattributes

@@ -59,3 +59,4 @@ owanr--r2_coedit/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 owanr--r2_coedit/val/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/val/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/val/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2530756bb56b7901b3dc1e9cfa0348be2390090c4c5ec46aebf8c7fcaddc78e4
+size 2371584