Track executed requests

[visola]

User Story

As a user, I want to be able to see the requests coming through.

Acceptance Criteria

• [x] All recent executed requests are stored with the following information
  • [x] request headers
  • [x] response headers
  • [x] Request body, up to a maximum size
  • [x] Response body, up to a maximum size
  • [x] Request timings
  • [x] Request final destination
  • [x] Request URL
  • [x] Executed URL
  • [x] Response Status
• [x] Request history is accessible through Admin API
• [x] There's an event system that can push events to the Admin UI
• [x] Admin UI shows a list of executed requests
  • [x] On load, all executed requests are loaded
  • [x] New requests are pushed to the Admin UI as they happen