refresh span name when trace completes in traces list

[codefromthecrypt]

Right now, the trace list has the first span name to complete, not the first span name to start (root trace) in the list. I can't seem to have this refresh to see the much better name.

Example, when the trace is complete, I want to see "user" not "POST" for the last span, or be able to hit '/' and have it fix the list.

[ymtdzzz]

Certainly, the spans shown in the list are the service root spans "at the time of arrival at otel-tui".
Real-time updating would be implemented by modifying AddSpan() to check if the received span is a parent of the currently stored service root span and swap them if necessary.

I'd like to work on this issue after closing #18 :)

Thanks for the suggestion as always!

[ymtdzzz]

I'm planning to work on this issue next week (after Kaigi on Rails 2024).

[ymtdzzz]

@codefromthecrypt , I think #172 solves this issue, could you check in that branch if you have time?