Systematize Faz 4 + close three observability gaps:
- WMI opportunity radar (getWmiOpportunities): group query_logs by
substring(vin,1,3) = WMI, rank low-success WMIs by distinct-user demand.
brandMatched=0 flags fully-uncovered manufacturer codes. Surfaced on the
Trends page (#wmi) + a dashboard header shortcut. Replaces the manual Faz 4.
- Per-source p50: add percentile_cont(0.50) to getProviderAttempts and
getProviderDeepStats; show P50·P95 on the dashboard and provider drill-down.
- unknown_vin_spike anomaly: track "tanınamadı" rate in the 15min/baseline
windows, fire when it jumps >=2x baseline (or surges from ~0), and attribute
the dominant failing source (+aborted count) in the Telegram message. Runs
in the existing 5min anomaly cron; worker/telegram unchanged (generic type).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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