Swaps HV/MV/LV scaling to supply power scaling (#20880)

Content.Server/Power/Pow3r/BatteryRampPegSolver.cs

@@ -170,6 +170,7 @@ namespace Content.Server.Power.Pow3r
                 }
             }
 
+            network.LastCombinedLoad = demand;
             network.LastCombinedSupply = totalSupply + totalBatterySupply;
             network.LastCombinedMaxSupply = totalMaxSupply + totalMaxBatterySupply;
 

Content.Server/Power/Pow3r/PowerState.cs

@@ -488,6 +488,11 @@ namespace Content.Server.Power.Pow3r
             /// </summary>
             [ViewVariables] public List<NodeId> BatterySupplies = new();
 
+            /// <summary>
+            ///     The total load on the power network as of last tick.
+            /// </summary>
+            [ViewVariables] public float LastCombinedLoad = 0f;
+
             /// <summary>
             ///     Available supply, including both normal supplies and batteries.
             /// </summary>