Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+izumi-lab--mc4-ja/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

izumi-lab--mc4-ja/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d372230c6d87bb088ccc96d40dabf2567f7ebf58cdafe444c0e28f7152ce0474
+size 488386560