[@envelop/plugin-prometheus] Need a way to filter which metrics are recorded

[klippx]

Is your feature request related to a problem? Please describe.

In our federated setup we have to be restrictive on histogram metrics, our we will have too much metrics too scrape. To some extent this can be fixed by customizing labels and reducing cardinality, but in some cases we actually want to opt in to the high cardinality metrics for a selection of operations.

Thus, we would like to have e.g. graphql_yoga_http_duration enabled but only if operationName matches certain allow listed values.

Describe the solution you'd like

We would like to be able to have a (mesh) config like this in the end

{
  prometheus: {
    metrics: {
      graphql_yoga_http_duration: createHistogram({
        registry,
        histogram: {
          name: 'graphql_yoga_http_duration',
          help: 'Time spent on HTTP connection',
          labelNames: ['operation_name'],
          buckets: HISTOGRAM_BUCKET_DIMENSIONS,
        },
        fillLabelsFn: ({ operationName }, _rawContext) => ({
          operation_name: operationName,
        }),
        shouldRecordFn: ({ operationName }, _rawContext) =>
          TRACKED_OPERATIONS.includes(operationName),
      })
    }
  }
}

Describe alternatives you've considered

Have to build our own stack of plugins all the way down to envelop (mesh plugin, yoga plugin, envelop plugin).