error-reporting

When you get a (very nice looking) miette error you get two trailing newlines, rather than just one. This is causing me some head scratching moments with testing error outputs in downstream applications

Demo

[package]
name = "miette-bug-demo"
version = "0.1.0"
edition = "2021"

[dependencies]
miette = { version = "3.0.0", features = [ "fancy" ] }
thiserror = "1.0.30"

This case should just be passed directly to the parent handler

Currently we use protobuf to document the representation format: https://github.com/soundcloud/periskop/blob/master/representation/errors.proto.

Since we are not planning to use protobuf as a serialization format, it would be more appropriate to use json schema instead.