Send messages to telemetry service from user equipment for MQTT exchanges

[nbuffon]

• Trace IoT message emission
  • Set W3C context as an MQTT property
  • Send span to the IoT observability service
• Trace IoT message reception
  • Extract W3C context from MQTT property
  • Send span to the IoT observability service

GIVEN a producer using the SDK was connected to the IoT message service
AND a consumer using the SDK was connected to the IoT message service
WHEN a message is transmitted
THEN I will see two traces with their associated span in the IoT observability
AND the span in the second trace will be linked to the span of the first trace

Note: this user story also implicitly tests the OpenTelemetry client