MIAMI — Amid a slew of recent legal troubles, Kodak Black will remain in federal custody — at least for the next month. If released, his attorney says he’s headed to rehab. The South Florida rapper, whose legal name is Bill Kapri, has been held in a Miami federal detention center since December after violating his probation on a gun-buying conviction dating back more than four years. On Monday, U.S. District Judge Jose Martinez abstained from ruling on whether the 26-year-old artist should continue to be detained on the probation violation. He granted more time for the rapper’s defense lawyer …