nightingale 是做什么的？
Create alert rules. Prefer reusing the validated rules in integrations (standard components like Linux/MySQL/Redis/Kafka/PostgreSQL/Elasticsearch all ship ready-made rule packs); import as many rules as the user needs—one rule, a batch, or a whole pack. Only hand-write a custom rule when integrations has nothing that fits. Supports all data sources: Prometheus / Loki / ES / OpenSearch / MySQL / PG / TDengine / ClickHouse / Doris / VictoriaLogs / Host. ⚠️ **Do NOT use this skill for bulk YAML