Add project files.

Models/Orders.cs

@@ -0,0 +1,35 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace LogisticsApp.Server.Models
+{
+    public class Order
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [StringLength(200)]
+        public string ClientName { get; set; } = string.Empty;
+
+        [Required]
+        [Column(TypeName = "decimal(18,2)")]
+        public decimal OrderCost { get; set; }
+
+        [Required]
+        public DateTime OrderDate { get; set; } = DateTime.UtcNow;
+
+        [Required]
+        [StringLength(20)]
+        public string Status { get; set; } = "pending"; // pending, in_progress, completed, cancelled
+
+        [Required]
+        [StringLength(500)]
+        public string Address { get; set; } = string.Empty;
+
+        public string Description { get; set; } = string.Empty;
+
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+        public DateTime? UpdatedAt { get; set; } = DateTime.UtcNow;
+    }
+}