Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 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/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f9170eff0c060e46d6271dab5868a1a4bd314bd666361d240bf81f42ad5434e9
+size 25440256