Describe the bug
Sending measurements with units does not work correctly for Cumulocity. The measurement is transmitted and displayed in Cumulocity, but the units do not appear on the graph.

To Reproduce

1. Simply create a device and set the unit of e.g. temperature.

tedge mqtt pub -r 'te/device/test///m/environment/meta' '{
  "units": {
    "tavg": "°C"
  }
}'

2. Then, publish some data:

tedge mqtt pub -r 'te/device/test///m/environment' '{
  "time": "2024-11-12T20:00:00",
  "tavg": 32
}'

The temperature value is displayed as expected, but without any units.

Expected behavior
The units should be displayed alongside the data.