JOHANNESBURG—South Africa’s highest court sentenced former President Jacob Zuma to 15 months in jail on Tuesday for failing to appear at a corruption inquiry, and gave him five days to appear before police. Zuma failed to appear at the inquiry led by Deputy Chief Justice Raymond Zondo in February, and the inquiry’s lawyers approached the constitutional court to seek an order for his imprisonment. “He has depleted all his (legal) options because there is no higher court to appeal to. The constitutional court is normally the last stop,” Amanda Gouws, a professor of political science at the University of Stellenbosch, said. “They have finally said ‘enough is enough’,” she said. Zuma, 79, was ousted in a move orchestrated by allies of his successor, President Cyril Ramaphosa, in 2018. Since then, he has faced determined legal moves aiming to bring him to book for alleged grand corruption during and before his …