chore: add /notify api endpoint to openapi.yml

[mfw78]

Background

It's frustrating when there are endpoints of which there is no documentation (noted that the endpoint in question is in development 😁).

Details

All endpoints should be documented in the applicable openapi.yml.

Acceptance criteria

• /notify endpoint documented in openapi.yml.

[github-actions]

This issue has been marked as stale because it has been inactive a while. Please update this issue or it will be automatically closed.

[MartinquaXD]

The /notify endpoint has been documented in the solvers create by now.
It's still not present in the driver openapi spec but that endpoint is only useful for the transition period where we are still running drivers for external solvers. Once solvers run their own drivers they can could get all the data from the logs or the competition endpoint.
Closing this issue for now. If there is enough demand down the line to keep this endpoint alive for some reason we can reopen it.