Pull realtime and trend power data from a home Sense energy monitor via its unofficial API

Steps

1. Note there is no official Sense API; integrations rely on reverse-engineered client libraries such as scottbonline/sense (Python) or brbeaird/sense-energy-node (Node.js)
2. Authenticate once with Sense account credentials to obtain a session, reusing the same client instance rather than re-authenticating repeatedly
3. Open a websocket connection to receive realtime power data, then close it immediately after reading a data packet
4. Call the trend-data update method separately to retrieve historical/trend stats per device
5. Avoid keeping multiple concurrent websocket streams open on one account