feat: add start term update and cron schedule update

ApiDto/Responses/Configuration/CronUpdateScheduleResponse.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Mirea.Api.Dto.Responses.Configuration;
+
+/// <summary>
+/// Represents the response containing the cron update schedule and the next scheduled task dates.
+/// </summary>
+public class CronUpdateScheduleResponse
+{
+    /// <summary>
+    /// Gets or sets the cron expression representing the update schedule.
+    /// </summary>
+    [Required]
+    public required string Cron { get; set; }
+
+    /// <summary>
+    /// Gets or sets the list of next scheduled task dates based on the cron expression.
+    /// </summary>
+    [Required]
+    public required List<DateTime> NextStart { get; set; }
+}