SAN DIEGO — The saga of the dormant KAABOO music festival has taken a new twist, with lawsuits in San Diego and Delaware that pit the event’s new owners — whose identity appears to be shrouded in mystery — against the San Diego Padres. The latest turn comes three years after KAABOO concluded its five-year run at the Del Mar Fairgrounds in 2019. It was then that the festival announced a new, multiyear partnership with the Padres and a 2020 move to the Major League Baseball team’s downtown Petco Park stadium, which the Padres operate and co-own with the city of San Diego. That prompted the fairg…