* Add the abilty for the caller to release and cancel background tasks
* Improve param validation
* Address PR comments
* Address PR comments.
* Address PR comments: cancel tasks before publishing the release
Set IsReleased and publish the ReleaseCompletion only after the in-flight
tasks have actually been cancelled, so a failure to cancel leaves the
session un-released instead of flagging it as released while its tasks are
still running.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
westey
56d13bce4e