Update duckdb index files

.gitattributes

@@ -27,3 +27,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
 *.csv filter=lfs diff=lfs merge=lfs -text
 ncduy--mt-en-vi/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ncduy--mt-en-vi/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ncduy--mt-en-vi/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9663dce2c57ad9b9951f93b4d052c4a4e62d77967aa7cb617a88e04d39a6fe0f
+size 5255168