Monitoring: Automated uptime alerts for guardrail

[AkhileshNegi]

Is your feature request related to a problem?
We currently lack a method to detect when the kaapi-guardrail is down or unreachable, thus outages are only reported manually. This can lead to prolonged unnoticed downtime and degraded user experience.

Describe the solution you'd like
Set up automated uptime monitoring for kaapi-guardrail so the team is notified within minutes whenever the service becomes unreachable, instead of relying on manual user reports

[AkhileshNegi]

This is now set up

as there was a health endpoint already present so pointed sentry to it

[andrianvaleanu]

Maunal reports are a slog. Adding an automated checker like https://pulsetic.com/ will notify you of outages fast.