I won’t pretend to be the expert on Jaboticaba taxonomy, I just defer to the book “Frutas no Brasil” by Brazilian taxonomist Harry Lorenzi. That book has the most recent classification of Plinias and Myrciarias which is trusted by all the big Jaboticaba collectors I know from Florida and Brazil.
Most of what you just said is accurate with two exceptions:
Sabara is Plinia jaboticaba, not Plinia cauliflora.
“Yellow Jaboticaba” is still Myrciaria glazioviana. A separate species with red fruit has been given to Myrciaria glomerata.
With regards to Plinia peruviana vs. trunciflora, there is still debate on that. One collector in Brazil just collected seeds from a tree in the wild that he calls Plinia peruviana, but it is clearly distinct from the Plinia trunciflora going around in Florida collections.