Update duckdb index files

.gitattributes

@@ -59,3 +59,4 @@ minority_examples/validation.anti_biased/index.duckdb filter=lfs diff=lfs merge=
 minority_examples/validation.biased/index.duckdb filter=lfs diff=lfs merge=lfs -text
 partial_input/train.anti_biased/index.duckdb filter=lfs diff=lfs merge=lfs -text
 partial_input/train.biased/index.duckdb filter=lfs diff=lfs merge=lfs -text
+partial_input/validation.anti_biased/index.duckdb filter=lfs diff=lfs merge=lfs -text

partial_input/validation.anti_biased/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e922c8c64d6e187be71a19ee34bc7d8fa964cce644f8a1d45905c7be3b45a9f0
+size 1847296