in order to determine if a worker can safely be terminated it would be good to have a rest api for this. The closest thing we get today is this script https://github.com/OctopusDeploy/OctopusDeploy-Api/blob/master/REST/PowerShell/Workers/GetWorkersUsedInTasks.ps1 which uses string matching in task log output - very rudimentary, and with tons of failure modes.

I know there's a "worker lease" table, a rest api endpoint covering that table would be great.