As for the nuclear reaction, you will note that the calculation is the reaction change in total mass. I gave the nuclear transformation but use isotopic atomic weights for the numbers. These include with each nucleus the associated electrons (which indeed do not balance) and therefore the result is correct. To do it otherwise you would need to use nuclear masses rather than atomic weights and add in the electrons. Burdensome. (BTW if I had got the electrons wrong, by using nuclear masses, then the real answer would have been for even more excess energy than I show).
You cannot do this, for much of the energy from proton addition will depart from the system by way of neutrinos in beta decays. That alone will result in a far lower effective energy balance.
But proton addition is not even a likely pathway. But you assumed it was.