Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ bg_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_other/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+bg_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

bg_caselaw/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f42885b8d0ec2b44853c462cc2a21b9bf2ea01783a8e808e8de9d285b499010d
+size 4730880