Update duckdb index files

.gitattributes

@@ -131,3 +131,4 @@ pt_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pt_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pt_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mt_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ro_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ro_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e124dcdc25dc4c8b2751ec7e60f8820f0ea8f883b3330e8cd6a1a564367d7271
+size 72626176