Mounts the operations endpoints a host needs for monitoring (OPS-01, OPS-02):

• GET /health → Cairnloop.Web.HealthPlug (liveness/readiness probe, 200 JSON).
• GET /metrics → Cairnloop.Web.MetricsPlug (Prometheus text; 501 until :telemetry_metrics_prometheus_core is added).

Call it from your host router, typically outside any authentication pipeline so infrastructure can reach the probes:

scope "/" do
  cairnloop_operations()
end

Options:

• :health_path — override the health path (default "/health").
• :metrics_path — override the metrics path (default "/metrics").