chore: update app version to 1.9.0, change Flutter build mode to debug, and add changes field to app info model for update dialogs

lib/data/model/app_info_model.dart

@@ -19,6 +19,7 @@ abstract class Info with _$Info {
     String? minVersion,
     String? module,
     bool? required,
+    List<String>? changes,
   }) = _Info;
 
   factory Info.fromJson(Map<String, dynamic> json) => _$InfoFromJson(json);