Fix server monitoring routes setup

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Context

Monitoring providers automatically add a metrics route when setting a server router. The route set in place was not getting any matches. This was because it was checking against a complete path, instead of a prefix.

Change

The router will now check against a Prefix instead of a complete path.

Tests were added to check that the Prometheus monitoring provider is properly setting a route and that the route is returning the expected metrics.

Other information

Additional documentation