Update duckdb index files

.gitattributes

@@ -3,3 +3,4 @@ knkarthick--highlightsum/csv-test.parquet filter=lfs diff=lfs merge=lfs -text
 knkarthick--highlightsum/csv-validation.parquet filter=lfs diff=lfs merge=lfs -text
 knkarthick--highlightsum/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 knkarthick--highlightsum/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+knkarthick--highlightsum/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

knkarthick--highlightsum/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:25f41a152c7b9d0792a704eb76782608de9ea4c04bdd1432a26035878a7b4917
+size 3682304