By Howard Schneider WASHINGTON (Reuters) – The Federal Reserve, set to approve another large interest rate increase early next month, is shifting to a debate over how much higher it can safely push borrowing costs and how and when to slow the pace of future increases. The U.S. central bank is likely to provide a signal at its Nov. 1-2 policy meeting as officials weigh what some see as growing risks to economic growth against a lack of obvious progress in lowering inflation from its pandemic-related surge. “This debate about exactly where we should go, and then become more data-dependent, is go…