Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ Gabriel--citesum_swe/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 Gabriel--citesum_swe/parquet-validation.parquet filter=lfs diff=lfs merge=lfs -text
 Gabriel--citesum_swe/parquet-test.parquet filter=lfs diff=lfs merge=lfs -text
 Gabriel--citesum_swe/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Gabriel--citesum_swe/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

Gabriel--citesum_swe/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:474dd56ed1bec384467744693785c7817e6f5acfd98aa8661ce6e317bcea6401
+size 413675520