On the night of the one-year anniversary of the police raid on the first Occupy Oakland encampment, a crowd of Occupy Oakland protesters zig-zagged on a march through the downtown before returning to Frank Ogawa Plaza, where they declared that they planned to hold an all-night vigil. The six-hour protest Thursday night, which drew no more than 300 protesters, was noticeably smaller than Occupy protests last year, which drew thousands. Throughout the night, as the march moved from the plaza…