Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 taln-ls2n--SSI/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 taln-ls2n--SSI/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 taln-ls2n--SSI/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:78d2f8ddc343d88c5d809f1058dab0020ad7e0f8eee6047ff529a403bfc7ae82
+size 1060864