Modified mqttclient's method to separate full metric's name into actual metric name and path, improving logging clarity and metric registration in the writing stage. The changes were made while validating the metric's type and recording them - the name and path are now correctly logged and registered, enhancing the tracking and categoricity of the metrics.

In the mqttclient.ts, the manner in which metrics were being named for writing points has been altered. Previously, an underscore was used to separate the core metric name and its associated type annotation (i.e `${metricName}_x`). This has been changed to use a colon instead (`${metricName}:x`.