Update duckdb index files

.gitattributes

@@ -299,3 +299,4 @@ all_all/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg_all/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 all_legislation/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_caselaw/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+en_contracts/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

en_contracts/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:62f9285d6171d0ee317a898cf4f6ca26b4ff5fccd8684377c61413ef33d2dbc8
+size 50081792