I think the Lin Hall Click board can be modified using a split ferrite toroid to act as a current sensor. Depends if the sensor is similar to the SS49E. A 3 bay adapter makes it unnecessarily "klunky". If just SPI interconnects and voltage a simple board should do it - is there one, like for the Raspberry Pi?
What is the quickest way to see if this and other Click boards are supported in Studio - someone warned me that some are not supported. Another way is to use a DAC Click board and have the current probe separate.
How do I judge the battery life for something like this? Is there somewhere to just add an external battery so no worries? For a data-logging app this thing would be running at least overnight.