Update duckdb index files

.gitattributes

@@ -104,3 +104,4 @@ it_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 it_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 lt_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 lv_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+lt_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

lt_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1e46dc2a8162dba25f55c1c36f6ee93bd06070a9bc17484e4e89b9a03aa224ad
+size 63975424