Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 yuniv--KoSST/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 yuniv--KoSST/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/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 sha256:10fdca7e66c4d7902386369db936e821dd7a2485b1f696cdee9bd0ecaefdff5e
+size 1847296