综合挑战：ShopHub全链路故障演练

solve()

ShopHub 故障演练报告
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1. 实例故障: 1个实例不健康
   [product-service] prod-2 @ 10.0.2.2:8002
2. 熔断触发: 3次
   payment-service: 1次开路, 最近原因=failure_rate=0.60 > threshold=0.50
   order-service: 2次开路, 最近原因=probe_failed
3. Saga补偿: 1个步骤失败需补偿
   saga-order-002 / create_payment -> 补偿: refund_payment
4. 活跃告警: 2条
   [p99_latency] order-service: 720.0 > 500.0
   [p99_latency] search-service: 450.0 > 300.0
5. 库存预警: 0个商品库存<10
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故障演练完成! 请根据以上报告制定恢复计划。