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/Deployment/Get/GetQueueJobDto.cs

@@ -9,6 +9,11 @@
         public DateTime? Started { get; set; }
         public DateTime? Finished { get; set; }
         public string? ErrorMessage { get; set; }
+        public Guid CorrelationId { get; set; }
+        public int Priority { get; set; }
+        public DateTime? ScheduledAt { get; set; }
+        public DateTime? HeartbeatAt { get; set; }
+        public string? WorkerName { get; set; }
         public int TargetCount { get; set; }
         public int SucceededTargetCount { get; set; }
         public int FailedTargetCount { get; set; }