fix(referral-service): 统一健康检查使用 wget

docker-compose.yml: curl -> wget (与 Dockerfile 一致)

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Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/docker-compose.yml

@@ -270,7 +270,7 @@ services:
       kafka:
         condition: service_started
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:3004/health"]
+      test: ["CMD", "wget", "-q", "--spider", "http://localhost:3004/health"]
       interval: 30s
       timeout: 3s
       retries: 3