fix(GOV-009): 完成脚手架审查整改

server/apps/api/src/health.service.ts

@@ -5,14 +5,17 @@ import type {
   HealthResponseDto,
 } from '../../../libs/http-contracts/src/health.dto';
 
+/** 依赖注入令牌避免健康服务耦合 ioredis 或 mysql2 客户端。 */
 export const REDIS_HEALTH_PORT = Symbol('REDIS_HEALTH_PORT');
 export const MYSQL_HEALTH_PORT = Symbol('MYSQL_HEALTH_PORT');
 
+/** 健康端口只要求只读检查，便于禁用态和测试实现遵循同一契约。 */
 export interface DependencyHealthPort {
   check(): Promise<DependencyHealthDto>;
 }
 
 @Injectable()
+/** 聚合依赖状态并统一清洗底层错误，禁止连接信息进入 HTTP 响应。 */
 export class HealthService {
   constructor(
     @Inject(REDIS_HEALTH_PORT) private readonly redis: DependencyHealthPort,