FIX: Use StringColumnModel to wrap EntityAttribute of type EntityName

Author: mkholt

src/DataverseProxyGenerator.Core/Metadata/DataverseMetadataFetcher.cs

@@ -220,6 +220,7 @@ private TableModel BuildTableModelFromMetadata(Dictionary<string, EntityMetadata
             DecimalAttributeMetadata decAttr => BuildDecimalColumn(decAttr),
             DoubleAttributeMetadata dblAttr => BuildDoubleColumn(dblAttr),
             MoneyAttributeMetadata moneyAttr => BuildMoneyColumn(moneyAttr),
+            EnumAttributeMetadata enumAttribute when enumAttribute.AttributeType == AttributeTypeCode.EntityName => BuildStringColumn(enumAttribute),
             EnumAttributeMetadata enumAttr => BuildEnumColumn(enumAttr),
             LookupAttributeMetadata lookupAttr when lookupAttr.AttributeType == AttributeTypeCode.PartyList => BuildPartyListColumn(lookupAttr),
             LookupAttributeMetadata lookupAttr => BuildLookupColumn(lookupAttr),
@@ -284,6 +285,14 @@ private void AddPrimaryIdColumn(TableModel table, EntityMetadata entityMetadata)
         MaxLength = attr.MaxLength,
     };
 
+    private StringColumnModel BuildStringColumn(EnumAttributeMetadata attr) => new StringColumnModel
+    {
+        LogicalName = attr.LogicalName,
+        SchemaName = attr.SchemaName,
+        DisplayName = ApplyLabelMapping(attr.DisplayName?.UserLocalizedLabel?.Label ?? attr.LogicalName),
+        Description = ApplyLabelMapping(attr.Description?.UserLocalizedLabel?.Label ?? string.Empty),
+    };
+
     private MemoColumnModel BuildMemoColumn(MemoAttributeMetadata attr) => new MemoColumnModel
     {
         LogicalName = attr.LogicalName,