Update duckdb index files

.gitattributes

@@ -9,3 +9,4 @@ axg/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 axb/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 boolq/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 boolq/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+boolq/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

boolq/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1485fbe0115745e03cb3556263fec2300e1d6fad04f19c06a965e4593db32b6e
+size 4206592