Update duckdb index files

.gitattributes

@@ -72,3 +72,4 @@ cs_other/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_other/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+da_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

da_caselaw/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cda61c2555a885434f03deb337bec2393a3a791ee50ff64090842129317eec85
+size 8400896