refactor(commons): consolidate List element-type/coercion into AttributeValueCodec; InstanceActor + CLI reuse it (#93)

src/ZB.MOM.WW.ScadaBridge.CLI/Commands/TemplateCommands.cs

@@ -1,6 +1,8 @@
 using System.CommandLine;
 using System.CommandLine.Parsing;
 using ZB.MOM.WW.ScadaBridge.Commons.Messages.Management;
+using ZB.MOM.WW.ScadaBridge.Commons.Types;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
 
 namespace ZB.MOM.WW.ScadaBridge.CLI.Commands;
 
@@ -239,9 +241,16 @@ public static class TemplateCommands
     internal const string ElementTypeOptionDescription =
         "Element scalar type for a List attribute (String, Int32, Float, Double, Boolean, DateTime). Required when --data-type is List.";
 
-    /// <summary>The element scalar types permitted for a List attribute (matches the Management API).</summary>
+    /// <summary>
+    /// The element scalar types permitted for a List attribute — derived from the
+    /// single source of truth, <see cref="AttributeValueCodec.IsValidElementType"/>,
+    /// so the CLI never drifts from the codec/Management API.
+    /// </summary>
     private static readonly string[] ValidElementScalars =
-        { "String", "Int32", "Float", "Double", "Boolean", "DateTime" };
+        Enum.GetValues<DataType>()
+            .Where(AttributeValueCodec.IsValidElementType)
+            .Select(t => t.ToString())
+            .ToArray();
 
     /// <summary>
     /// Validates the <c>--data-type</c> / <c>--element-type</c> combination client-side so
@@ -268,7 +277,8 @@ public static class TemplateCommands
                 return false;
             }
 
-            if (!ValidElementScalars.Contains(elementType!.Trim(), StringComparer.OrdinalIgnoreCase))
+            if (!Enum.TryParse<DataType>(elementType!.Trim(), ignoreCase: true, out var parsed)
+                || !AttributeValueCodec.IsValidElementType(parsed))
             {
                 error = $"Invalid --element-type '{elementType}'. Valid List element scalars are: "
                     + string.Join(", ", ValidElementScalars) + ".";