NASHVILLE, Tenn. — On the final day of baseball’s winter meetings, the Padres helped roust the annual gathering from its slumber. And in completing a trade that sent outfielders Juan Soto and Trent Grisham to the Yankees, the Padres made strides toward achieving two of their overriding offseason objectives — adding to their starting rotation and trimming salary. In return for the generational offensive talent of Soto — and relief from the contracts of him and Grisham — the Padres received pitcher Michael King. It was reported earlier in the day — and confirmed by a source — that the other play…