LDT-5291: Cloud Communication - SW - 01 - Device-RT to Cloud - Integration - Demo Focus - R&I - 03: DEV - Feature Implementation & Code Document [& Diagnostics]
- Added MQTT message statistics (mqtt.stats) for tracking message publication and subscription times.
- Added CAN message receive statistics (can.stats).
- Updated MqttClient to change MqttClient::didMessageReceived signature to match QMqttClient.
- Update CANDumpPlayer to add per-frame, per-message, and total replay duration statistics.
- Fixed the debug build against the b2qt SDK by undefining _FORTIFY_SOURCE, which is baked into CXX in the SDK and errors during build under -Werror without optimization.