Update duckdb index files

.gitattributes

@@ -69,3 +69,4 @@ pt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pt/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pt/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ru/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ru/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ru/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:047d4f48109a5e93138b24ff495b87f8fbc843e0d7dc91d2c8295ca2c25bdcb8
+size 2633728