SAN FRANCISCO — The Padres spent three weeks playing teams that had losing records. The long run of Reds and Pirates and Guardians and the like ended with their arrival in the Bay Area late Thursday night. The series that awaited them against the Giants would be a test. Two one-run victories ensued on Friday and Saturday, and then on Sunday the Padres completed their first sweep at Oracle Park in nearly six years with a 10-1 victory. The Padres had a season-high 17 hits, including three doubles and a triple by Manny Machado, MacKenzie Gore allowed one run in completing six innings for the firs…