Print Display rather than Debug forms of errors

[tjkirch]

The Debug form doesn't include the 'display' information specified in the error
enum, including the source error, so we were losing context.

---

This uses the same main wrapper that we had elsewhere, but more consistently, so we see the full display form.

Testing done:

Unit tests pass.

Before, you'd see an error like this on the console; it's the Debug form, without the source error.

ip-192-168-107-131 login: [   44.077462] moondog[2899]: Error: APIRequest { method: "PATCH", uri: "/settings", source: ResponseStatus { code: 400, uri: unix://2f72756e2f6170692e736f636b:0/settings } }

After, you see an error like this; the Display form with the source error for context. (This is for a new error I'm adding in the next PR - spoilers!)

ip-192-168-96-10 login: [   36.633092] moondog[2906]: Error sending PATCH to /settings: Status 400 when requesting unix://2f72756e2f6170692e736f636b:0/settings: Json deserialize error: Unable to deserialize into KubernetesClusterName: Given invalid cluster name 'https://SNIP.yl4.us-west-2.eks.amazonaws.com': cluster names must be valid Kubernetes label values at line 1 column 1562

[zmrow]

🏋