Update duckdb index files

.gitattributes

@@ -77,3 +77,4 @@ fi_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 et_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fi_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 es_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+fi_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

fi_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1d0da50a84020d214202d127e2e59c3ed60ec9fedfc5d5351750d33dd49b12b6
+size 52178944