#813 add State validation on getting mem delta

src/Azos.Sky.Server/Fabric/Server/FiberProcessorDaemon.cs

@@ -49,6 +49,9 @@ private sealed class daemonRuntime : ApplicationComponent<FiberProcessorDaemon>,
       public daemonRuntime(FiberProcessorDaemon director) : base(director){ }
       public override string ComponentLogTopic => CoreConsts.FABRIC_TOPIC;
 
+      public override MessageType ComponentEffectiveLogLevel => ComponentDirector.ComponentEffectiveLogLevel;
+      public override string ComponentLogFromPrefix => $"@{ComponentSID}:FabProcNode(`{ComponentDirector.ProcessorId}`).";
+
       public int   Version => VERSION_YYYYMMDD;
       public float SystemLoadCoefficient => ComponentDirector.SystemLoadCoefficient;
       public bool  IsRunning => ComponentDirector.Running;

src/Azos.Sky/Fabric/Fiber.cs

@@ -77,6 +77,30 @@ internal void __processor__ctor(IFiberRuntime runtime, FiberParameters pars, Fib
     /// </summary>
     public FiberState      State => m_State;
 
+
+
+    /// <summary>
+    /// Fiber processor log writer.
+    /// Logging depends on <see cref="IApplicationComponent.ComponentEffectiveLogLevel"/> of the processor runtime
+    /// </summary>
+    public Guid WriteLog(Azos.Log.MessageType type,
+                         string from,
+                         string text,
+                         Exception error = null,
+                         Guid? related = null,
+                         string pars = null,
+                         [System.Runtime.CompilerServices.CallerFilePath] string file = null,
+                         [System.Runtime.CompilerServices.CallerLineNumber] int src = 0)
+    {
+      var rtc = Runtime.CastTo<ApplicationComponent>("Runtime is AC");
+
+      var ff = $"{GetType().DisplayNameWithExpandedGenericArgs()}(`{State.CurrentStep}`)";
+      from = from.IsNotNullOrWhiteSpace() ? $"{ff}.{from}" : ff;
+
+      return rtc.WriteLog(type, from, text, error, related, pars, file, src);
+    }
+
+
     /// <summary>
     /// Interprets the incoming signal by performing some work and generates <see cref="FiberSignalResult"/>.
     /// Returns null if the signal is unhandled.

src/Azos.Sky/Fabric/Intfs.cs

@@ -158,6 +158,6 @@ public interface IFiberRuntime : IApplicationComponent
     /// emails and direct emails at debugging endpoint instead, or add "TESTING" watermark
     /// </summary>
     bool IsDebugging { get; }
-  }
 
+  }
 }