Originally Posted by dlm3
• Active fermentation has ceased
This looks like the problem. At 3 days, you might have been mostly done, but it clearly wasn't completely done. I hate to be Captain Obvious, but you probably should have taken that gravity reading and assessed matters before adding 6oz of strong bourbon. I guess it's not a whole lot of extra alcohol, but it surely didn't help matters with it being near 8% at that point before the bourbon.
You an try rousing and raising the temps, and go the wlp099 route if that doesn't work. That's be my advice. Next time, give a 1.093 beer at least 3 weeks, not 3 days, before adding spirits. Better yet, do it at bottling. The other thing that comes to mind is, with all the tannins you're going to get from the oak and whiskey, this beer won't taste as sweet as you think it may. Let taste be your guide rather than numbers.
Oh, and never boil coffee if you like your tastebuds. Cold steep for this kind of thing.