Update duckdb index files

.gitattributes

@@ -1,2 +1,3 @@
 allegro--klej-allegro-reviews/csv-train.parquet filter=lfs diff=lfs merge=lfs -text
 allegro--klej-allegro-reviews/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+allegro--klej-allegro-reviews/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

allegro--klej-allegro-reviews/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1fe89d1f25073b19c05af5b00e2d18de94a94c6c69c975eba08d48a55b39bed8
+size 1847296