Update duckdb index files

.gitattributes

@@ -74,3 +74,4 @@ et_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 es_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fi_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+et_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

et_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0f991753e713ca4353ccff202d4dbab1ab7b6a3993342508cb113931fa854785
+size 50606080