Refactor info record structure

[datadavev]

The info response is a bit organic and should be refactored a little to reflect the different aspects of the response. Perhaps something like:

{
  "parsed": {
  // Info from the results of parsing the input
  },
  "computed: {
  // Results of computing target, redirect code, canonical form
  },
  "metadata": {
    // Info from the matching PID definition
  },
}