Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ selfapr-defects4j-out/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sequencer-corpus-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sequencer-defects4j-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sequencer-defects4j-out/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+sequencer-vul4j-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

sequencer-vul4j-in/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cd9dca8b583f6d96fc32d845ecc7e148ae4ee1b3c0ee15ec81da12d494dc9fa1
+size 1323008