Update duckdb index files

.gitattributes

@@ -327,3 +327,4 @@ cs_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 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_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9435dfecc1b904402a3143205fa0132d497a6b3248bd2db01c0fd2c7ebefa22e
+size 26226688