Product Review Workflow

Proposed PR overhaul: https://docs.google.com/document/d/1rHLCLxMXzOQ0Iwn-75FRJk4tC-5JTiE2G-bmA0sSISA/edit#heading=h.aq97vb363shz

Proposed workflow: https://lucid.app/lucidchart/891867fe-6bf7-4f27-96ff-74248a4cd421/edit?page=0_0#