Update duckdb index files

.gitattributes

@@ -227,3 +227,4 @@ all_contracts/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -tex
 all_legislation/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 all_all/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 all_other/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+bg_all/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

bg_all/partial-validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f99018daca1bc9db375c1d711820e3114f5619054df155c5f48a38ce9d9823da
+size 87568384