Maybe it’s karma for the way Apple has dealt out restrictions on its App Store developers lately. Or it could be the mother of all technology marketing stunts, coming a week after a competitor releases a well-reviewed smartphone. In any event, Apple may have lost more than a prototype fourth-generation iPhone, left behind in a Silicon Valley bar by an employee whose name everyone now knows thanks to a popular tech blog. A company whose penchant for secrecy is rivaled only by those writing the last episode of “Lost” may have indeed suffered an embarrassing security breach.