Create end point for machine logbook

The existing endpoint should allow to record event into the logbook which source is the machine.

• End-point /dataacquisition/:apiKey/notification
• If no instrumentName or investigationId => create machine notification
• add a new API_KEY dedicated to the machine?

• getEvents should also return machine notifications:
  • all for beamline logbook
  • machine notification with date in experiment startDate/endDate