By Humeyra Pamuk and Daren Butler ISTANBUL (Reuters) – Likening foes in the judiciary to medieval “Assassins” betraying Turkey, Tayyip Erdogan made one thing clear as he assumed the presidency last month: his battle to purge their influence over the courts is far from over. The power struggle has transformed a judicial election next month, normally an unassuming affair, into a key battleground. The vote will decide the members of the High Council of Judges and Prosecutors (HSYK), responsible for the appointments, transfers, promotions and expulsions of the country’s top judicial figures. …