Expor endpoint /metrics em formato Prometheus

[MarcosBrendonDePaula]

Problema

O MonitoringPlugin coleta metricas mas nao as expoe. Nao ha forma de monitorar a aplicacao em producao.

Solucao

1. Criar endpoint GET /metrics com formato Prometheus
2. Expor metricas de:
   • Requests (count, duration histogram, status codes)
   • Plugins (hook execution time, error count)
   • Live Components (connections ativas, rooms, state syncs)
   • Runtime (memory, event loop lag)
3. Opcao de proteger endpoint com auth

Beneficio

Permite integrar com Prometheus + Grafana, Datadog, New Relic, etc.

Esforco Estimado

3-5 dias