OK, so I've searched for a comprehensive keyboard shortcut lists for Resolve V19 and did not find one, so I spent many hours over the last few days creating one myself and am going to share it here. I tried to determine how best to lay things out and to determine what shortcuts were defined by default. I went about that in multiple ways.
I exported the default set from the Keyboard Customization panel and went through the document line by line pulling out the shortcuts listed there (it was pretty much a mess and included zero Fusion shortcuts). It was far from complete, so I then went through every menu, sub menu, panel menu, viewer menu, and context menu in Resolve and pulled them from there. I then entered every keystroke into the Keyboard Customization panel to determine the context as it defines them. Even it was incorrect in many places, and many times the context didn't make sense to me and some that appear in menus were not defined in the Key Customization panel at all. I assumed they were hardwired or built-in by default.
In the Spreadsheet and PDFs, you'll find the complete list of shortcuts in Resolve V19, along with comments on some that I found either didn't work, or to give hints as to context, especially those that appear nowhere in any menu. I've provided the working spreadsheet that you can mold for any output format you like. I've also provided 2 sets of PDFs, two with comments and two without. One set is sorted by Command or Action, or how it might appear in a menu, and the other is sorted by the Keystroke. Note that I tried for consistency in that where there is something like Ctrl + Shift + X, I always listed the Ctrl/Alt before the Shift, and Numpad keys are simply enumerated as Num 1, Num 2, Num *, etc., with no "+". I think it'll be clear.
If you find anything that I've missed, or is incorrect, please post it here, and I'll try to keep a master copy up to date. Enjoy. Cheers.
EDIT (Feb 3): I found an error on the "[" and "]" shortcuts. I indicated that they had Fusion context, but they do not. Not a biggie, but I have updated the master and it will be reflected in an update. I am also thinking of another layout that only shows context by Page (and then sub panels if necessary, e.g., Color > Nodes, as some shortcuts are pretty specific), instead of what I have. I found it difficult at times to represent things correctly with either the "Menu Item" or using comments. I'm not sure if
where a shortcut appears in the various menus is helpful or not (let me know). If anyone has any other ideas to make it easier to use/understand, let me know.