Update duckdb index files

.gitattributes

@@ -62,3 +62,4 @@ cs_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+de_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

de_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2b8b21713f75255055fa9183c23ca9bbfa42cca8cfc4e0f24da8a5d0c6e5eba6
+size 67121152