Receiving node at Beckman station should be powered from mains

[iingram]

For Beckman station where we have mains power, we should use that to supply power to Pappus nodes. The same applies at mobile SageBRUSH stations as we have solar power solutions there.

So, we need a reliable, easily built design for outdoor supply of power external to the main Pappus node enclosures.

(Note: If, however, Pappus nodes become super low power, we might move away from this plan but certainly for the short-term we should do it. Related: as Pappus nodes' power requirements drop, we should always keep an eye on having them have their own stand-alone, integrated solar power solutions.)