fix: 完善 API 基础设施验收

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

@@ -9,6 +9,10 @@ import { HttpStatus } from "@nestjs/common";
 export class HealthService implements OnModuleDestroy {
   private readonly redis: RedisClientType;
 
+  get redisClient(): RedisClientType {
+    return this.redis;
+  }
+
   constructor(@Inject(PrismaService) private readonly prisma: PrismaService) {
     this.redis = createClient({
       url: process.env.REDIS_URL ?? "redis://127.0.0.1:6379",