[Task]: Correctly emit traces on faucet

[igamigo]

Node's components affected by this task

Faucet

What should be done?

On the faucet, when any error occurs on the server's actions, it is not logged correctly to the console. Instead, errors are bubbled up as Result<_,_>, and absorbed in the top level. Instead, it should be logged as an error trace.

How should it be done?

On the endpoint functions, make sure that if any error is returned, it is logged and shown pertinently.

When is this task done?

When, for example, we can see internal server errors on the console.

Additional context

#498 (comment)

[Mirko-von-Leipzig]

This has likely been fixed in the migration from actix to axum in #479.

It now uses tower's http-trace which has sensible defaults and I presume logs failures.

I would keep this issue open as we may want to improve the traces further by customizing them.

The axum tracing example shows some things we may want to include, like the rejection of extractors (we use the Json<T> extractor for example).