Progress on testing classify_by method; need to pass preference of channel to patch generator without disrupting existing options to export RGB / multichannel stacks

Product methods call RoiSet directly; this is causing problems with multichannel ones where raw data is essentially re-issues to RGB channels

Some test coverage, those that are failing are because of issues propagating nested parameters to pydantic models

Combined all export products into a single call, which routes individual products' export methods and parameters

Fixed bug where error was raised generating 3D patches where expanded 3D stack encountered min/max of range