Prevent ProgressMessageTarget from ever reading the command from the database.

src/NzbDrone.Core/ProgressMessaging/ProgressMessageContext.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NzbDrone.Core.Messaging.Commands;
+
+namespace NzbDrone.Core.ProgressMessaging
+{
+    public static class ProgressMessageContext
+    {
+        [ThreadStatic]
+        private static CommandModel _commandModel;
+
+        [ThreadStatic]
+        private static bool _reentrancyLock;
+        
+        public static CommandModel CommandModel
+        {
+            get { return _commandModel; }
+            set { _commandModel = value; }
+        }
+
+        public static bool LockReentrancy()
+        {
+            if (_reentrancyLock)
+                return false;
+
+            _reentrancyLock = true;
+            return true;
+        }
+
+        public static void UnlockReentrancy()
+        {
+            _reentrancyLock = false;
+        }
+    }
+}