Update duckdb index files

.gitattributes

@@ -77,3 +77,4 @@ cs_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 el_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_contracts/train/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 sha256:237fe3be38088dc57e3256bcdb0c3bd7c02bdf479ff1ffb0a706511751a44ad3
+size 28061696