New: Monitor and Process downloads separately

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

src/NzbDrone.Core/Download/DownloadsProcessedEvent.cs

@@ -0,0 +1,11 @@
+using NzbDrone.Common.Messaging;
+
+namespace NzbDrone.Core.Download
+{
+    public class DownloadsProcessedEvent : IEvent
+    {
+        public DownloadsProcessedEvent()
+        {
+        }
+    }
+}