Support for reporter tags

[dneuhaeuser-zalando]

It would be nice to get support for setting the reporter.tags which show up as "Additional Details" in the trace view.

Currently everything is in the tags of the span, which causes quite a bit of unnecessary duplication and noise in the UI because most of the time I care about the tags that were specifically set on a particular span.

[ruiaraujo]

@dneuhaeuser-zalando This is supported, you can pass a tags object to the tracer.

[DasIch]

Indeed, that works. Thanks!

I can't find documentation for that though, so that is still something that may need improving.