Update duckdb index files

.gitattributes

@@ -290,3 +290,4 @@ all_other/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_all/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_all/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_caselaw/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+en_contracts/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

en_contracts/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:41935bf215fb19c40b575fbdde3bc68e95833147d3000d36c4cd83ca18289f2a
+size 8721281024