docs: 补齐核心枚举注释

src/Domain/TakeoutSaaS.Domain/Reservations/Enums/ReservationStatus.cs

@@ -5,9 +5,28 @@ namespace TakeoutSaaS.Domain.Reservations.Enums;
 /// </summary>
 public enum ReservationStatus
 {
+    /// <summary>
+    /// 已提交待确认。
+    /// </summary>
     Pending = 0,
+
+    /// <summary>
+    /// 预约已确认。
+    /// </summary>
     Confirmed = 1,
+
+    /// <summary>
+    /// 客户已到店签到。
+    /// </summary>
     CheckedIn = 2,
+
+    /// <summary>
+    /// 已取消。
+    /// </summary>
     Cancelled = 3,
+
+    /// <summary>
+    /// 未到店被标记为爽约。
+    /// </summary>
     NoShow = 4
 }