Refactor code structure for improved readability and maintainability

Models/DeploymentJobTargetModel.cs

@@ -0,0 +1,30 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Microsoft.SelfService.Portal.Core.API.Models
+{
+    public class QueueJobTargetModel : BaseModel
+    {
+        [Column(Order = 1)]
+        public Guid QueueJobId { get; set; }
+
+        [Column(Order = 2)]
+        public Guid VirtualMachineId { get; set; }
+
+        [Column(Order = 3)]
+        public Guid DeploymentGroupId { get; set; }
+
+        [Column(Order = 4)]
+        public Guid TemplateId { get; set; }
+
+        [Column(Order = 5)]
+        public string Status { get; set; } = QueueJobStatus.Pending;
+
+        [Column(Order = 6)]
+        public int Attempts { get; set; }
+
+        [Column(Order = 7)]
+        public string? ErrorMessage { get; set; }
+
+        public QueueJobModel QueueJob { get; set; }
+    }
+}