Adding a custom label to a certain route possible?

[mdio]

Hi! I would like to add an additional, custom label (e.g. templateName) to a specific route in my service.
The value for this would come from request.body.
There are currently less than 10 different template names so this label should be manageable by Prometheus.

From inspecting the code of your plugin, I don't think that this is currently possible.
Could you please confirm this?

If so, what would be a good way to achieve this in your opinion?
Is there maybe a way to set context.config.statsId instead of adding a custom label?