feat: dxrating payload dump

sdgb-api/src/title/model/mod.rs

@@ -15,6 +15,7 @@ pub use get_user_data_api::{GetUserDataApi, GetUserDataApiResp};
 
 mod get_user_rating_api;
 pub use get_user_rating_api::dxrating::{
+    DataVersion,
     DxCalculatedEntries, // entries
     DxLevelName,         // level name
     DxMusicRecord,