Incorporated new excludeLastModified parameter into Save()

The `SqlTopicRepository.Save()` method is now updated to use the new `excludeLastModified` parameter of `TopicRepositoryBase.GetAttributes()` (562945c). This maintains its existing functionality of excluding the byline (`LastModifiedBy`) and dateline (`LastModified`) in case no other attributes have been modified, while _also_ supporting the new `IsExtendedAttributeMismatch()` functionality of `TopicRepository.Base.GetAttributes()` (a3d4798), which treats attributes as `IsDirty` if their configured storage location (`AttributeDescriptor.IsExtendedAttribute`) has changed since the attribute has last changed.

This complete the bug fix for extended attribute mismatches—an unfortunately complex solution to an edge case.

Author: JeremyCaney

OnTopic.Data.Sql/SqlTopicRepository.cs

@@ -289,22 +289,26 @@ public override int Save([NotNull]Topic topic, bool isRecursive = false, bool is
       /*------------------------------------------------------------------------------------------------------------------------
       | Add indexed attributes that are dirty
       \-----------------------------------------------------------------------------------------------------------------------*/
-      //Exclude indexed attributes if the only dirty attributes are `LastModified` and/or `LastModifiedBy`, as these are
-      //automatically generated and don't represent genuine changes to the topic.
-      if (topic.Attributes.IsDirty(true)) {
 
-        var indexedAttributes   = GetAttributes(topic, false, true);
+      //Only include `LastModified` and/or `LastModifiedBy` if other attributes in the collection are `IsDirty`, as these are
+      //automatically generated and don't represent genuine changes to the topic.
+      var excludeLastModified   = !topic.Attributes.IsDirty(excludeLastModified: true);
 
-        foreach (var attributeValue in indexedAttributes) {
+      var indexedAttributes     = GetAttributes(
+        topic                   : topic,
+        isExtendedAttribute     : false,
+        isDirty                 : true,
+        excludeLastModified     : excludeLastModified
+      );
 
-          var record              = attributes.NewRow();
-          record["AttributeKey"]  = attributeValue.Key;
-          record["AttributeValue"]= attributeValue.Value;
-          attributeValue.IsDirty  = false;
+      foreach (var attributeValue in indexedAttributes) {
 
-          attributes.Rows.Add(record);
+        var record              = attributes.NewRow();
+        record["AttributeKey"]  = attributeValue.Key;
+        record["AttributeValue"]= attributeValue.Value;
+        attributeValue.IsDirty  = false;
 
-        }
+        attributes.Rows.Add(record);
 
       }
 
@@ -313,7 +317,7 @@ public override int Save([NotNull]Topic topic, bool isRecursive = false, bool is
       \-----------------------------------------------------------------------------------------------------------------------*/
       extendedAttributes.Append("<attributes>");
 
-      foreach (var attributeValue in GetAttributes(topic, true, null)) {
+      foreach (var attributeValue in GetAttributes(topic, isExtendedAttribute:true)) {
 
         extendedAttributes.Append(
           "<attribute key=\"" + attributeValue.Key + "\"><![CDATA[" + attributeValue.Value + "]]></attribute>"