Update duckdb index files

.gitattributes

@@ -6,3 +6,4 @@ nlhappy--CMeEE/parquet-train-00001-of-00002.parquet filter=lfs diff=lfs merge=lf
 nlhappy--CMeEE/parquet-validation.parquet filter=lfs diff=lfs merge=lfs -text
 default/parquet-train.parquet filter=lfs diff=lfs merge=lfs -text
 default/parquet-validation.parquet filter=lfs diff=lfs merge=lfs -text
+default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5e084ffcc8aa46e1bb4aef9871c45b829d052ff37616bbb595f859ee6a09bcbb
+size 2371584