Function resolve_effort_route 

pub fn resolve_effort_route<'a>(
    policy: &EffortRoutingConfig,
    routes: &'a [ModelRouteConfig],
    message: &str,
) -> Option<ResolvedEffortRoute<'a>>

Resolve the selected route and the complete physical-provider boundary for one opted-in turn. Hint matching is exact, matching config validation and ModelRouteResolver semantics.