While Taiwan’s government has reckoned with some of the traumas of its past — including by creating a museum devoted to a notorious 1947 massacre — researchers say far fewer resources have been devoted to chronicling the decades of political repression under the rule of Chiang Kai-shek’s Kuomintang, the Chinese Nationalist Party that ruled Taiwan as a one-party state from 1945 until Taiwan’s first democratic presidential election in 1996.