refs: https://github.com/TryGhost/Team/issues/1121
refs: dfffa309a8
- This makes a fundamental change to Ghost's server side error handling, so that no unhandled errors are used as API responses
- Anything that has been handled and rethrown as a Ghost error cna be trusted
- We also already trust a couple of known errors from bookshelf and handlebars
- Everything else is assumed to be a code error, and should not be shown as the main message
- Instead we use our generic fallback message and use the OG error as context
