Update duckdb index files

.gitattributes

@@ -240,3 +240,4 @@ el_all/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 el_legislation/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_all/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_caselaw/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+en_contracts/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

en_contracts/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:28e71cff6c26544797d75fcdf792a51982444bb9ea5a8c85af13fc85a49374c3
+size 52441088