feat: errors are reported within the metadata of the Github comment

[gentlementlegen]

Resolves #22

[gentlementlegen]

Changes

On success or failure, the url of the related run is added to the metadata of the Github comment. This helps seing more details about the root cause of the crash. On success, the generated result is posted as well.

QA run

Meniole#6 (comment)
Metadata content:

<!--
https://github.com/Meniole/conversation-rewards/actions/runs/9952235232
{
  "caller": "<anonymous>"
}
-->

[0x4007]

This technically is not the spec but it may also solve the problem in a better way.

[gentlementlegen]

This technically is not the spec but it may also solve the problem in a better way.

What part is not in the spec, the URL to the Action run? Thought it was a nice to have, lemme know if that's fine. Just fixed the CI tests as well.