When longtime Maryland state Del. Bonnie Cullison (D-Montgomery County) announced she would retire, Christa Tichy immediately saw an opportunity. The queer Democrat advanced from the June primary and will appear on the November ballot, hoping to succeed one of Maryland’s first openly LGBTQ legislators and preserve LGBTQ representation in Annapolis. “But when Bonnie made that announcement, I knew right away that that’s what I was supposed to do,”…