fix(windows): 資料產生器測試用的正規化方法改為公開

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CM3dbt782c4iCA1TJyn2p8

Author: NickYCLin

mySQLPunk/lib/DataGeneratorCore.cs

@@ -1017,7 +1017,7 @@ private static object Temporal(DataGeneratorColumn column, DateTime value)
         }
 
         /// <summary>唯一性比對用的正規化文字；大小寫不分，因 MySQL／SQL Server 預設定序視為重複。</summary>
-        internal static string Canonical(object value)
+        public static string Canonical(object value)
         {
             if (value == null || value is DBNull) return NullMarker;
             if (value is byte[]) return BitConverter.ToString((byte[])value);