check_power_budget

Check an electronics design's power budget by summing worst-case load on each supply rail, comparing it against what the rail can deliver with the user's margin, flagging any rail over budget, and recording the sourced budget in the twin. Use when the user asks whether a regulator or battery can supply the board, asks for a power or current budget per rail, asks how much headroom a rail has, or when a power or current requirement needs analysis evidence.