Update duckdb index files

.gitattributes

@@ -314,3 +314,4 @@ data/sv_other_validation_0.jsonl.xz filter=lfs diff=lfs merge=lfs -text
 data/en_wikipedia_train_1.jsonl.xz filter=lfs diff=lfs merge=lfs -text
 bg_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+bg_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

bg_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1d2d0b6ccc81afbbd6a55c9e243132fbba1d3dbb253c90d268482d36a318d448
+size 13905920