On April 1, the most veteran City Hall staffer left the building. It could come as a surprise that this title belonged to 29-year-old Seraphie Allen, but it also might speak to the youthful tenacity required to remain in Portland City Hall for six years straight. Allen, who joined Mayor Ted Wheeler’s staff after volunteering on his initial mayoral campaign in 2016, has led a variety of projects since entering the office: From drafting first-of-their-kind...