Update duckdb index files

.gitattributes

@@ -298,3 +298,4 @@ en_all/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 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_caselaw/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8e66cd71a5fcd67aa54fbc6e6f2a0e14afbe9a345e8c779341745ec31d53d0fd
+size 14430208