Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ EddieChen372--devign_with_norm_vul_lines/test/index.duckdb filter=lfs diff=lfs m
 EddieChen372--devign_with_norm_vul_lines/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 EddieChen372--devign_with_norm_vul_lines/validation/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 sha256:78f560098e893b01bcd84e16f2434cb02f70b365d3f4ad752e6c88e0ffb8609c
+size 273428480