fix(lmxproxy): handle DateTime[] COM arrays in TypedValueConverter

DateTime[] from MxAccess was falling through to ToString() fallback,
producing "System.DateTime[]" instead of actual values. Now converts
each DateTime to UTC ticks and stores in Int64Array.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/Domain/TypedValueConverter.cs

@@ -107,6 +107,13 @@ namespace ZB.MOM.WW.LmxProxy.Host.Domain
                     return new Scada.TypedValue { ArrayValue = new Scada.ArrayValue { StringValues = arr } };
                 }
 
+                case DateTime[] dtArr:
+                {
+                    var arr = new Scada.Int64Array();
+                    arr.Values.AddRange(Array.ConvertAll(dtArr, dt => dt.ToUniversalTime().Ticks));
+                    return new Scada.TypedValue { ArrayValue = new Scada.ArrayValue { Int64Values = arr } };
+                }
+
                 default:
                     // VT_UNKNOWN or any unrecognized type — ToString() fallback
                     Log.Warning("Unrecognized COM variant type {Type}, using ToString() fallback", value.GetType().Name);