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
 bem/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+bem/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

bem/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c392890705213e742d5066641689990f035ae73fd30c2ea8733f824695b4eec6
+size 1060864