STDOUT/STDERR logs to separate endpoints

[uniqueg]

Is your feature request related to a problem? Please describe.
According to the WES v1.0.0 specs, stdout and stderr in the run and task logs of the GET /runs/{run_id} response should consist of URLs pointing to these logs, not the logs themselves (as is currently implemented).

Describe the solution you'd like
Add an OpenAPI spec for additional endpoints, e.g., /logs/stdout/{id} and /logs/stderr/{id} where run and task logs can be retrieved from via GET requests. Business logic for the existing GET /runs/{run_id} endpoint needs to be adjusted accordingly.

Describe alternatives you've considered
N/A

Additional context
N/A

[uniqueg]

Started implementation together with #128