Implementiere WithMessage und WithMessageKey Methoden in IServiceMessage

Methoden hinzugefügt, um Nachrichten direkt oder über Enum-Schlüssel hinzuzufügen, unterstützt Methodenverkettung in IServiceMessage.

DigitalData.Core.Contracts/Application/IServiceMessage.cs

@@ -17,5 +17,20 @@
         /// success notifications, or other relevant information related to the operation's outcome.
         /// </summary>
         List<string> Messages { get; set; }
+
+        /// <summary>
+        /// Adds a new message to the collection of service messages.
+        /// </summary>
+        /// <param name="message">The message to add.</param>
+        /// <returns>The current instance of IServiceMessage, allowing for method chaining.</returns>
+        IServiceMessage WithMessage(string message);
+
+        /// <summary>
+        /// Adds a message corresponding to the specified message key to the collection of service messages.
+        /// This method uses the string representation of the enum value as the message.
+        /// </summary>
+        /// <param name="messageKey">The enum value representing the message key.</param>
+        /// <returns>The current instance of IServiceMessage, allowing for method chaining.</returns>
+        IServiceMessage WithMessageKey(Enum messageKey);
     }
 }