Mike Rizzo and Co. in the Nats’ front office got a haul of prospects from the Padres at the trade deadline… “I was relieved, I really was,” Nationals’ manager Davey Martinez told reporters in his post game press conference on the night Washington traded both Juan Soto and Josh Bell to the San Diego Padres for a high-end prospect package and one big league bat. “I felt a different — a breath of fresh air, and for me it was about regrouping, and saying, ‘Alright, this is what we need to do moving forward. So, we’re going to go out…