A controversial plan to build a massive Sutter Health medical center dominated an Emeryville City Council candidate forum Thursday night. Resident Jeff Johnson expressed concerns about the 335,000-square-foot project’s magnitude, saying the added traffic and load on city services could be “damaging for the city for years and decades to come.” Council incumbents David Mourra and Kalimah Priforce declined to give an opinion on whether the project should proceed, citing rules against city officials weighing in on projects with pending…