Update duckdb index files

.gitattributes

@@ -7,3 +7,4 @@ task2-API-refine/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 task2-API-refine/TESTOOV/index.duckdb filter=lfs diff=lfs merge=lfs -text
 task2-API-refine/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 task3-options/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+task3-options/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

task3-options/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:47a62cc9818395fa4a7a8f578a6e15e521a8dce5a879c546714e7a5e00d3d9f7
+size 1585152