Add an option to add a prefix to every metric

[TheElectronWill]

Suggested by Thomás:

I think the metrics names should start with something representative like alumet_* . This way if you have a time series database with multiple metrics from other sources, it is easily recognizable which ones are coming from alumet.

[guigomcha]

I believe that this functionality would be very nice for our environment. At first glance it looks like it could be global for all plugins if we added a new option to the CLI and then checked it in AlumetPluginStart.create_metric and AlumetPluginStart.create_metric_untyped

Any suggestion or pointer ?

[TheElectronWill]

It could be implemented without touching the core of Alumet, with a transform step that would change the metrics before they are exported via the outputs.

[guigomcha]

@TheElectronWill could you assign the issue to me?

[TheElectronWill]

Sure! Don't hesitate if you have questions regarding the implementation.