ServiceMonitor scrapes the metrics port (9090) at 30s intervals.
PrometheusRule ships all 12 alerts: 7 availability (degraded shards,
node down, high latency, stuck tasks, stuck rebalance, settings
divergence, anti-entropy mismatch) + 5 resource pressure (memory,
request queue, background queue, peer discovery, no leader).
Both gated behind serviceMonitor.enabled / prometheusRule.enabled
(defaults: false — requires prometheus-operator in cluster).
Also adds metrics port to the miroir Service so ServiceMonitor can
select it.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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