feat(dcl): surface MxGateway attribute DataType through browse seam

src/ZB.MOM.WW.ScadaBridge.DataConnectionLayer/Adapters/IMxGatewayClient.cs

@@ -18,7 +18,7 @@ public record MxReadOutcome(string TagPath, bool Success, object? Value, Quality
 public record MxWriteOutcome(string TagPath, bool Success, string? Error);
 
 /// <summary>One node in a Galaxy browse level.</summary>
-public record MxBrowseChild(string NodeId, string DisplayName, BrowseNodeClass NodeClass, bool HasChildren);
+public record MxBrowseChild(string NodeId, string DisplayName, BrowseNodeClass NodeClass, bool HasChildren, string? DataType = null);
 
 /// <summary>
 /// Seam over the MxAccess Gateway .NET client + Galaxy repository client. Decouples

src/ZB.MOM.WW.ScadaBridge.DataConnectionLayer/Adapters/MxGatewayDataConnection.cs

@@ -267,7 +267,7 @@ public class MxGatewayDataConnection : IDataConnection, IBrowsableDataConnection
         // and no continuation is ever surfaced (ContinuationToken stays null).
         var (children, truncated) = await _client.BrowseChildrenAsync(parentNodeId, cancellationToken);
         var nodes = children
-            .Select(c => new BrowseNode(c.NodeId, c.DisplayName, c.NodeClass, c.HasChildren))
+            .Select(c => new BrowseNode(c.NodeId, c.DisplayName, c.NodeClass, c.HasChildren, DataType: c.DataType))
             .ToList();
         return new BrowseChildrenResult(nodes, truncated);
     }

src/ZB.MOM.WW.ScadaBridge.DataConnectionLayer/Adapters/RealMxGatewayClient.cs

@@ -266,7 +266,8 @@ public sealed class RealMxGatewayClient : IMxGatewayClient
                     attr.FullTagReference,
                     attr.AttributeName,
                     BrowseNodeClass.Variable,
-                    false));
+                    false,
+                    string.IsNullOrEmpty(attr.DataTypeName) ? null : attr.DataTypeName));
             }
         }
 

tests/ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Tests/Adapters/MxGatewayDataConnectionTests.cs

@@ -245,6 +245,24 @@ public class MxGatewayDataConnectionTests
         Assert.Equal(BrowseNodeClass.Variable, result.Children[1].NodeClass);
     }
 
+    [Fact]
+    public async Task BrowseChildrenAsync_surfaces_attribute_datatype()
+    {
+        var fake = new FakeMxGatewayClient
+        {
+            BrowseHandler = _ => (new List<MxBrowseChild>
+            {
+                new("Area1.Pump.Speed", "Speed", BrowseNodeClass.Variable, false, "Double"),
+            }, false)
+        };
+        var adapter = NewAdapter(fake);
+        await adapter.ConnectAsync(Details());
+
+        var result = await adapter.BrowseChildrenAsync(null);
+
+        Assert.Equal("Double", result.Children[0].DataType);
+    }
+
     [Fact]
     public async Task BrowseChildrenAsync_throws_when_not_connected()
     {