Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 Belle_open_source_1M.json filter=lfs diff=lfs merge=lfs -text
+BelleGroup--train_1M_CN/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

BelleGroup--train_1M_CN/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a173e003dd5845429143a8c9f0f88aa3155174d783ca0c5f3c06750aba76f337
+size 407646208