fix：修复LoginCoreService依赖注入问题，支持双模式用户服务

- 添加@Inject('UsersService')装饰器到LoginCoreService构造函数
- 支持根据配置动态切换UsersService和UsersMemoryService
- 确保开发测试模式和生产环境的无缝切换
- 修复之前服务启动时的依赖注入错误

src/core/login_core/login_core.service.ts

@@ -103,7 +103,7 @@ export interface VerificationCodeResult {
 @Injectable()
 export class LoginCoreService {
   constructor(
-    private readonly usersService: UsersService,
+    @Inject('UsersService') private readonly usersService: UsersService,
     private readonly emailService: EmailService,
     private readonly verificationService: VerificationService,
   ) {}