Update duckdb index files

.gitattributes

@@ -65,3 +65,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 3/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 3/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 3/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+4/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

4/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:18dcca1e6b4a1b6687c356550a762980f45e1379305f0309164ef10c69263a5b
+size 2371584