Add System Log to the statusRecord

csharp/App/SaliMax/src/Ess/StatusRecord.cs

@@ -25,6 +25,7 @@ public record StatusRecord
     public required RelaysRecord?       Relays              { get; init; } 
     public required AmptStatus?         PvOnDc              { get; init; } 
     public required Config              Config              { get; init; } 
+    public required SystemLog           Log                 { get; set; }    // TODO: init only
     
     public required EssControl          EssControl          { get; set; }    // TODO: init only
     public required StateMachine        StateMachine        { get; init; } 

csharp/App/SaliMax/src/Ess/SystemLog.cs

@@ -0,0 +1,8 @@
+namespace InnovEnergy.App.SaliMax.Ess;
+
+public record SystemLog
+{
+    public required String? Message  { get; init; }
+    public required LedState Led      { get; init; }
+
+}