feat: Add comments to clarify the need for APPLICATIONSTATUS and SHIFTSTATUS enums in ShiftsRepositoryImpl

apps/mobile/packages/features/staff/shifts/lib/src/data/repositories_impl/shifts_repository_impl.dart

@@ -15,6 +15,8 @@ class ShiftsRepositoryImpl
   // Cache: ApplicationID -> RoleID (For Accept/Decline w/ Update mutation)
   final Map<String, String> _appToRoleIdMap = {};
 
+  // This need to be an APPLICATION
+  // THERE SHOULD BE APPLICATIONSTATUS and SHIFTSTATUS enums in the domain layer to avoid this string mapping and potential bugs.
   @override
   Future<List<Shift>> getMyShifts({
     required DateTime start,