feat(chart): add observability support (metrics, ServiceMonitor)

[birdmanmandbir]

Summary

Add observability features to the Helm chart for production monitoring.

Tasks

• Metrics Service - Expose operator metrics for Prometheus scraping

  • Create templates/metrics-service.yaml
  • Expose port 8443 (HTTPS metrics endpoint)

• ServiceMonitor - Prometheus Operator integration

  • Create templates/servicemonitor.yaml
  • Add metrics.serviceMonitor.enabled value (default: false)
  • Configure TLS and bearer token auth

• Grafana Dashboard - Optional dashboard for operator metrics

  • Create templates/grafana-dashboard.yaml (ConfigMap)
  • Add metrics.dashboard.enabled value

Values Structure

metrics:
  enabled: true
  service:
    port: 8443
  serviceMonitor:
    enabled: false
    interval: 30s
    scrapeTimeout: 10s
  dashboard:
    enabled: false

Reference

The operator exposes metrics at :8443/metrics with HTTPS and bearer token auth (from ServiceAccount).