When presented with one of the biggest news stories of the century, one would hope that those covering it would make the most of the opportunity to inform the public about its scope and implications. That’s especially true when those ramifications have impacts that are far-reaching, both in our everyday lives and our metaphysical deliberations. Unfortunately, when it comes to coverage of one of the most significant milestone news events of recent years, those goals never reach the fruition they deserve, as becomes regrettably apparent in the recently released documentary feature, “Citizenfour.”