.NET Workflows - Integrate Element Aliasing (#835)

* Checkpoint

* Update test workflows

* Update workflows/MathChat.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update folder

* Cleanup

* Signed package version

* Rollback nuget.config

* Cleanup

* Set `ProductContext`

* Move product initialization.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

dotnet/src/Microsoft.Agents.Workflows.Declarative/DeclarativeWorkflowBuilder.cs

@@ -50,10 +50,9 @@ public static class DeclarativeWorkflowBuilder
     {
         BotElement rootElement = YamlSerializer.Deserialize<BotElement>(yamlReader) ?? throw new DeclarativeModelException("Workflow undefined.");
 
-        // ISSUE #486 - Use "Workflow" element for Foundry.
         if (rootElement is not AdaptiveDialog workflowElement)
         {
-            throw new DeclarativeModelException($"Unsupported root element: {rootElement.GetType().Name}. Expected an {nameof(AdaptiveDialog)}.");
+            throw new DeclarativeModelException($"Unsupported root element: {rootElement.GetType().Name}. Expected an {nameof(Workflow)}.");
         }
 
         string rootId = WorkflowActionVisitor.Steps.Root(workflowElement.BeginDialog?.Id.Value);

dotnet/src/Microsoft.Agents.Workflows.Declarative/Extensions/BotElementExtensions.cs

@@ -14,6 +14,7 @@ internal static class BotElementExtensions
             DialogAction action => action.Id.Value,
             ConditionItem conditionItem => conditionItem.Id ?? throw new DeclarativeModelException($"Undefined identifier for {nameof(ConditionItem)} that is member of {conditionItem.GetParentId() ?? "(root)"}."),
             OnActivity activity => activity.Id.Value,
+            SystemTrigger trigger => trigger.Id.Value,
             _ => throw new DeclarativeModelException($"Unknown identify for element type: {element.GetType().Name}"),
         };
 }

dotnet/src/Microsoft.Agents.Workflows.Declarative/Interpreter/WorkflowElementWalker.cs

@@ -6,6 +6,11 @@ namespace Microsoft.Agents.Workflows.Declarative.Interpreter;
 
 internal sealed class WorkflowElementWalker : BotElementWalker
 {
+    static WorkflowElementWalker()
+    {
+        ProductContext.SetContext(Product.Foundry);
+    }
+
     private readonly DialogActionVisitor _visitor;
 
     public WorkflowElementWalker(DialogActionVisitor visitor)

dotnet/src/Microsoft.Agents.Workflows.Declarative/ObjectModel/AddConversationMessageExecutor.cs

@@ -20,7 +20,7 @@ internal sealed class AddConversationMessageExecutor(AddConversationMessage mode
         StringExpression conversationExpression = Throw.IfNull(this.Model.ConversationId, $"{nameof(this.Model)}.{nameof(this.Model.ConversationId)}");
         string conversationId = this.State.Evaluator.GetValue(conversationExpression).Value;
 
-        ChatMessage newMessage = new(this.GetRole(), [.. this.GetContent()]) { AdditionalProperties = this.GetMetadata() };
+        ChatMessage newMessage = new(this.Model.Role.Value.ToChatRole(), [.. this.GetContent()]) { AdditionalProperties = this.GetMetadata() };
 
         await agentProvider.CreateMessageAsync(conversationId, newMessage, cancellationToken).ConfigureAwait(false);
 
@@ -41,18 +41,6 @@ internal sealed class AddConversationMessageExecutor(AddConversationMessage mode
         }
     }
 
-    private ChatRole GetRole()
-    {
-        if (this.Model.Role is null)
-        {
-            return ChatRole.User;
-        }
-
-        AgentMessageRoleWrapper roleWrapper = this.State.Evaluator.GetValue(this.Model.Role).Value;
-
-        return roleWrapper.Value.ToChatRole();
-    }
-
     private AdditionalPropertiesDictionary? GetMetadata()
     {
         if (this.Model.Metadata is null)