Duplicate models fields fix

DiunaBI.Domain/Entities/QueueJob.cs

@@ -12,6 +12,7 @@ public class QueueJob
     public JobType JobType { get; set; }
     public int Priority { get; set; } = 0; // 0 = highest priority
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime ModifiedAt { get; set; } = DateTime.UtcNow;
     public int RetryCount { get; set; } = 0;
     public int MaxRetries { get; set; } = 5;
     public JobStatus Status { get; set; } = JobStatus.Pending;
@@ -19,9 +20,7 @@ public class QueueJob
     public DateTime? LastAttemptAt { get; set; }
     public DateTime? CompletedAt { get; set; }
     public Guid CreatedById { get; set; }
-    public DateTime CreatedAtUtc { get; set; } = DateTime.UtcNow;
     public Guid ModifiedById { get; set; }
-    public DateTime ModifiedAtUtc { get; set; } = DateTime.UtcNow;
 }
 
 public enum JobType

DiunaBI.Domain/Entities/User.cs

@@ -5,6 +5,11 @@ namespace DiunaBI.Domain.Entities;
 
 public class User
 {
+    /// <summary>
+    /// System user ID for automated operations (imports, scheduled jobs, etc.)
+    /// </summary>
+    public static readonly Guid AutoImportUserId = Guid.Parse("f392209e-123e-4651-a5a4-0b1d6cf9ff9d");
+
     #region Properties
     public Guid Id { get; init; }
     public string? Email { get; init; }