Health Checks for Updates design review

[Maxim Khutornenko]

Hi,

I have put together a design proposal for improving health-enabled job
update performance. Please, review and leave your comments:

https://docs.google.com/document/d/1ZdgW8S4xMhvKW7iQUX99xZm10NXSxEWR0a-21FP5d94/edit

Thanks,
Maxim