Refactor JobException message handling

Renamed the `Message` method to `CreateMessage` for clarity and updated its usage in the `JobException` constructor. Simplified the error message format by removing visual separator lines, resulting in cleaner and more concise output.

ECMJobRunner.Application/Common/Exceptions/JobException.cs

@@ -26,7 +26,7 @@ namespace ECMJobRunner.Application.Common.Exceptions
         /// </remarks>
         public JobException(string jobName, string processName, string batchId, string? reason, Exception? innerException, params (string Name, string? Value, bool IgnoreIfNull)[] details) 
             : base(
-                  Message(jobName,
+                  CreateMessage(jobName,
                   [
                       ("Process Name", processName, false),
                       ("Batch Id", batchId, false),
@@ -65,26 +65,22 @@ namespace ECMJobRunner.Application.Common.Exceptions
         /// Message format:
         /// <code>
         /// {jobName} could not be completed.
-        /// ─────────────────────────────────────────
         ///   Process Name: {processName}
         ///   Batch Id: {batchId}
         ///   {additional details...}
-        /// ─────────────────────────────────────────
         /// </code>
         /// Details with IgnoreIfNull=true are omitted when their value is null.
         /// </remarks>
-        internal static string Message(string jobName, IEnumerable<(string Name, string? Value, bool IgnoreIfNull)> details)
+        internal static string CreateMessage(string jobName, IEnumerable<(string Name, string? Value, bool IgnoreIfNull)> details)
         {
             var message = new System.Text.StringBuilder();
             message.AppendLine($"{jobName} could not be completed.");
-            message.AppendLine("─────────────────────────────────────────");
             foreach (var (name, value, ignoreNullValue) in details)
             {
                 if (ignoreNullValue && value is null)
                     continue;
                 message.AppendLine($"  {name}: {value}");
             }
-            message.AppendLine("─────────────────────────────────────────");
             return message.ToString();
         }
     }