ads-monitor

跨平台监控广告投放的投放节奏、表现、创意疲劳与数据质量。

定期监控付费广告账号的投放节奏、投放表现、creative fatigue、追踪与数据质量，能抓异常、检验预算进度和验收上线表现。适合做日报/周报、异常排查、预算把控或投放复盘。特色是对比规范化快照，能分离学习期、季节性与上报延迟，减少误报。

# Paid Media Monitoring

1. Load two or more normalized snapshots with compatible account, timezone,
   currency, metric, and attribution definitions.
2. Validate data freshness and finalization windows before comparing periods.
3. Separate expected learning, seasonality, reporting latency, and planned changes
   from unexplained anomalies.
4. Evaluate pacing, delivery, conversion quality, unit economics, creative fatigue,
   tracking health, policy status, and changed account objects.
5. Return observations, confidence, likely causes, required investigation, and
   decision thresholds. Do not mutate the account.
6. Persist a versioned monitoring bundle and link detected failures to regressi