Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ KikiQi--xlcost-ct-python-program/train/index.duckdb filter=lfs diff=lfs merge=lf
 KikiQi--xlcost-ct-python-program/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 KikiQi--xlcost-ct-python-program/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 KikiQi--xlcost-tc-python-program/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+KikiQi--xlcost-tc-python-program/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

KikiQi--xlcost-tc-python-program/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:975bec5b8efe350ccc715f26dff0bfd3e48d816de4cb8a013868431860608134
+size 1847296