- Move TenantRepository and Repository interfaces from types.go to new interfaces.go file
- Add mvno package import for MVNO-related repository methods
- Add CreateMVNO, GetMVNO, GetMVNOByBusinessID, UpdateMVNO, ListMVNOs, DeleteMVNO, UpdateMVNOStatus, and GetMVNOStats methods to Repository interface
- Remove context import from types.go after interface extraction