While some of the record PNC Park crowd scattered over the Allegheny River in an effort to beat traffic, the ones who remained during the ninth inning of the Pirates’ 8-0 season-ending loss to the Giants on Wednesday night realized and appreciated what was happening. Russell Martin — the 31-year-old Bucs catcher who has had a career season and turned into a beloved figure — led off the final half inning of the National League Wild Card Game to a chant of “Re-sign Russ!”