moleculer-metrics

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Hi all)

I think it would be useful to store action response (not only error) in payload on metrics.trace.span.finish event. And because of response can huge/confident this feature will turn off by default, but it could be activated by setting response option to true/object/function like params option

// Action definition
{
    metrics: { 
        params: true,
        meta: true,
        response: true // default false
    }
}

// or


{
    metrics: { 
        params: true,
        meta: true,
        response: ['id', 'name']
    }
}

Good idea.