FRANKFORT, Ky. — What does it cost to miss a deadline? For the company that makes the prescription painkiller Oxycontin, the answer could be more than $1 billion. Kentucky is suing Purdue Pharma on claims that the company misrepresented its prescription painkiller, resulting in a wave of addiction across the state and increased medical costs for all its users. But before the trial can start, both sides must file “admissions” so the court could determine a set of facts that are not in dispute …