Add queue hardening by modifying DeploymentJobTargets, DeploymentJobSteps, and DeploymentJobs tables

- Drop existing indexes on DeploymentJobTargets and DeploymentJobSteps
- Alter Status column to nvarchar(450) in DeploymentJobTargets, DeploymentJobSteps, and DeploymentJobs
- Add new columns: Finished, OutputMetadataJson, Started to DeploymentJobTargets; ErrorMessage, Finished, OutputMetadataJson, Started to DeploymentJobSteps; CorrelationId, HeartbeatAt, Priority, RowVersion, ScheduledAt, WorkerName to DeploymentJobs
- Create new indexes for improved query performance
- Add constraints to ensure OutputMetadataJson is valid JSON
- Record migration in __EFMigrationsHistory

Dto/DeploymentBatch/Get/GetDeploymentBatchDto.cs

@@ -1,12 +1,21 @@
-namespace Microsoft.SelfService.Portal.Core.API.Dto.DeploymentBatch.Get
+namespace Microsoft.SelfService.Portal.Core.API.Dto.DeploymentBatch.Get
 {
     public class GetDeploymentBatchDto : BaseDetailsDto
     {
-        public Guid TemplateId { get; set; }
+        public Guid? TemplateId { get; set; }
 
         public Guid? DeploymentRuleId { get; set; }
 
         public string Status { get; set; } = string.Empty;
+
+        public Guid? PrimaryTemplateVersionId { get; set; }
+
+        public string? PrimaryTemplateName { get; set; }
+
+        public string? PrimaryTemplateVersion { get; set; }
+
+        public int TemplateSelectionCount { get; set; }
+
+        public int TargetAssignmentCount { get; set; }
     }
 }
-