"Manually start a task run, overriding the current schedule" API request inconsisten behaviour

I'm on Version 2.0.2 (84496e5) and I'm pretty sure this API request didn't behave like this in 2.0.1 or something.
First of all, on the docs it says https://docs.influxdata.com/influxdb/v2.0/api/#operation/PostTasksIDRuns that the returning JSON has the `log` field which I'm very much not getting:

second and important: is the request supposed to wait for the task to finish and return the result or not? How can the request return status `scheduled` for a task which has no `scheduledFor` parameter and hence should run immediately? The task in question fails.

1. fix the response JSON type to show "logs" is optional
2. clarify whether the request waits for the task to finish if it's supposed to run immediately
3. fix returning "scheduled" if the task failed

Start with the PostTasksIDRuns endpoint and compare its documented response with the behavior reported against version 2.0.2. Trace how an immediate task run is scheduled and how its status and logs are represented. Done means the response schema, waiting behavior, and failed-task status are clarified or corrected consistently.

Written by the indexing model from the issue text.