Monitor with async reading

Description

This MR introduces a new monitor that has asynchronous reading. It will send data in bunches (randomly between 1-9 values) directly to the async_readback endpoint.

Related Issues

closes #67 (closed) and closes #48 (closed)

Type of Change

• Change 1

Additional Notes

separate MR closes #68 (closed)

To test the new device in BEC

I added the new device in BEC which works fine. To reproduce, add the following device to the demo config:

async_bpm:
  readoutPriority: async
  deviceClass: ophyd_devices.sim.sim_monitor_async.SimMonitorAsync
  deviceConfig:
    device_access: true
  deviceTags:
    - beamline
  enabled: true
  readOnly: false
  softwareTrigger: true

Remark

I followed the pydantic model for DeviceMessage, however, for both 'append' and 'extend' options the async_data is not properly unpacked in the s.scan.async_data when 'value' and 'timestamp' are both provided. Issue in BEC is created -> bec#309 (closed)

Definition of Done

• Documentation is up-to-date.
• include device_progress -> I am trying to test the device_progress callbacks in BEC, but struggling a bit with the simulation for the moment. Postponed to Monday