It's "her time" to get into the family business. Caroline Kennedy's high-profile appointment to Barack Obama's vice-presidential search team was orchestrated in a deal brokered by her famous uncle, Massachusetts Sen. Ted Kennedy, in exchange for his endorsement, The Post has learned. It was the result of Carolina, a 50-year-old Harvard grad, indicating to her now-ailing uncle that it was "her time" to get into politics, insiders told The Post. JFK's daughter is looking to get her feet wet in political affairs, sources said, including the possibility she could one day run for office in some capacity or accept a...