feat: add Department and UserDepartment entities

apps/server/src/entities/index.ts

@@ -24,3 +24,5 @@ export { SyncLog } from './sync-log.entity';
 export { SyncState } from './sync-state.entity';
 export { ExpenseType } from './expense-type.entity';
 export { Notification, NotificationType } from './notification.entity';
+export { Department, DepartmentType } from './department.entity';
+export { UserDepartment } from './user-department.entity';