Refactor code structure for improved readability and maintainability

Models/DeploymentBatchModel.cs

@@ -0,0 +1,19 @@
+using Microsoft.SelfService.Portal.Core.API.Extensions.Dataannotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Microsoft.SelfService.Portal.Core.API.Models
+{
+    public class DeploymentGroupModel : BaseModel
+    {
+        [Column(Order = 2)]
+        public Guid TemplateId { get; set; }
+        
+        [Column(Order = 4)]
+        [DefaultValueSql("'New'")]
+        public string Status { get; set; }
+        
+        public TemplateModel Template { get; set; }
+
+        public ICollection<DeploymentModel> Deployments { get; set; }
+    }
+}