Refactor code structure for improved readability and maintainability

Models/DeploymentRuleStepModel.cs

@@ -0,0 +1,27 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Microsoft.SelfService.Portal.Core.API.Models
+{
+    public class DeploymentRuleStepModel : BaseModel
+    {
+        [Column(Order = 1)]
+        public Guid DeploymentRuleId { get; set; }
+
+        [Column(Order = 2)]
+        public int SortOrder { get; set; }
+
+        [Column(Order = 3)]
+        public string Name { get; set; }
+
+        [Column(Order = 4)]
+        public string StepType { get; set; } = QueueJobStepType.Provision;
+
+        [Column(Order = 5)]
+        public bool RequiresApproval { get; set; }
+
+        [Column(Order = 6)]
+        public string? MetadataJson { get; set; }
+
+        public DeploymentRuleModel DeploymentRule { get; set; }
+    }
+}