Add project files.

Models/WaybillEntry.cs

@@ -0,0 +1,32 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace LogisticsApp.Server.Models
+{
+    public class WaybillEntry
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [ForeignKey("Vehicle")]
+        public int VehicleId { get; set; }
+
+        [Required]
+        [ForeignKey("Order")]
+        public int OrderId { get; set; }
+
+        [Required]
+        [StringLength(5)]
+        public string StartTime { get; set; } = string.Empty; // Format: "HH:mm"
+
+        [Required]
+        [StringLength(5)]
+        public string EndTime { get; set; } = string.Empty; // Format: "HH:mm"
+
+        [Required]
+        public DateOnly Date { get; set; }
+
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    }
+}