New MxGateway:Metrics:RequireAuthentication (default false). When true,
/metrics requires an API key with the admin scope (verified through the
cached verifier and the shared API-key failure limiter) or a dashboard
login with a real dashboard role; anonymous localhost and
Authentication:Mode=Disabled do not qualify. An anonymous scrape gets a
plain 401 Bearer challenge, a throttled peer 429. /health stays anonymous
because the off-repo Overview dashboard polls /health/active.
MapZbMetrics returns IEndpointConventionBuilder, so the policy is attached
with RequireAuthorization.
Joseph Doherty
65bca804bb