Update duckdb index files

.gitattributes

@@ -156,3 +156,4 @@ ga_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 it_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 lv_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 it_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+lt_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

lt_caselaw/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:708a1df9df8913defcb58606700af1a7862ca28d08ae2d32a7c63e4df34eeafe
+size 5779456