Add PreferenceFilePath to ExecutionSession

Author: twastvedt

src/DynamoCore/Configuration/ExecutionSession.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using Dynamo.Interfaces;
@@ -26,6 +26,7 @@ public ExecutionSession(Scheduler.UpdateGraphAsyncTask updateTask, DynamoModel m
             parameters[ParameterKeys.LastExecutionDuration] = new TimeSpan(updateTask.ExecutionEndTime.TickCount - updateTask.ExecutionStartTime.TickCount);
             parameters[ParameterKeys.PackagePaths] = pathManager.PackagesDirectories;
             parameters[ParameterKeys.Logger] = model.Logger;
+            parameters[ParameterKeys.PreferenceFilePath] = pathManager.PreferenceFilePath;
         }
 
         /// <summary>

src/NodeServices/ExecutionSession.cs

@@ -81,6 +81,10 @@ public class ParameterKeys
         /// The return value is an ILogger
         /// </summary>
         public static readonly string Logger = nameof(Logger);
-        
+
+        /// <summary>
+        /// The path to the preference file that is being used by Dynamo.
+        /// </summary>
+        public static readonly string PreferenceFilePath = nameof(PreferenceFilePath);
     }
 }