(feature) graphana and prometheus metrics

[pro1code1hack]

Ticket (if applicable)

Self-hosted support

• Your feature is implemented for the selfhosted version of Swetrix
• [ x This PR only updates the production code (e.g. paddle webhooks, CAPTCHA, blog, etc.)

Database migrations

• Clickhouse / MySQL migrations added for this PR
• No table schemas changed in this PR

Documentation

• You have updated the documentation according to your PR
• This PR did not change any publicly documented endpoints

I have implemented the Grafana feature here, once webhooks are merged, will create a separate issue for adding integrations in apps/production/src/task-manager/task-manager.module.ts

Method Name	Metrics
handleUserReports	Count of reports sent
handleSubscriberReports	Count of reports sent to subscribers
lockDashboards	Count of locked dashboards
checkOnlineUsersAlerts	Count of online user alerts (telegram, slack, discord)
checkMetricAlerts	Count of metrics (telegram, slack, discord)

As well I will create an issue for this task, as I have done planning within my personal notepad, which should be trackable for everyone through an issue

[pro1code1hack]

@Blaumaus , could you play around the FE part of the grafana, please to make visualisation better?