Retrieve device telemetry logged data.

Command	Endpoint	Description
GET	/telemetry/signals	Retrieve list of available telemetry signals for a given site
GET	/telemetry/last	Retrieve most recent value for an ID and telemetry signal combination
GET	/telemetry/history	Retrieve time series data of telemetry signal values for a given site ID and time range
GET	/telemetry/history/operational/aggregate	Retrieve time series data of telemetry signal values for a given group ID and time range