Update duckdb index files

.gitattributes

@@ -41,3 +41,4 @@ arampacha--rsicd/valid/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arampacha--rsicd/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/valid/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/valid/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1f0bea457eafc401553d4bf3f3e5aaa4df5490aa6938ced748f59a39d7c58557
+size 116404224