Council member Jim Graham (D-Ward 1) is apparently mad at DCist over this post. Tweets @JimGraham_Ward1, “Last night, I was a celebrity guest bagger at Safeway benefiting prostate cancer research. DCist joked about it … joked?? Tasteless.” A tempest in a teapot if ever there was one — especially since Graham didn’t even serve out his Safeway shift last night. He told DCist that he showed up at the appointed time, but Safeway had him…