Added new modules and updated existing logic

dev/backend/HotlinePlanner profile pic and bg worker/Models/EventLog.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace HotlinePlanner.Models
+{
+    public class EventLog
+    {
+        public int Id { get; set; }
+        
+        public DateTime Timestamp { get; set; } = DateTime.UtcNow;
+        
+        [Required]
+        public string Level { get; set; } = "Info"; // Info, Warning, Error
+        
+        [Required]
+        public string Category { get; set; } = string.Empty; // Auth, BackgroundWorker, UserAction
+        
+        [Required]
+        public string Message { get; set; } = string.Empty;
+        
+        public string? Tenant { get; set; }
+        
+        public string? UserId { get; set; }
+        
+        public string? Payload { get; set; } // JSON or extra details
+    }
+}

dev/backend/HotlinePlanner profile pic and bg worker/Models/Token.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace HotlinePlanner.Models
+{
+    [Table("Tokens_v2")]
+    public class Token
+    {
+        public int Id { get; set; }
+        
+        public DateTime Timestamp { get; set; } = DateTime.UtcNow;
+        
+        [Required]
+        public string Tenant { get; set; } = string.Empty;
+        
+        [Required]
+        public string UserId { get; set; } = string.Empty;
+
+        public string? UserEmail { get; set; }
+        
+        [Required]
+        public string Provider { get; set; } = string.Empty;
+        
+        [Required]
+        public string EncryptedToken { get; set; } = string.Empty;
+        
+        public DateTime LastUpdated { get; set; } = DateTime.UtcNow;
+        
+        public bool Enabled { get; set; } = true;
+    }
+}

dev/backend/HotlinePlanner profile pic and bg worker/Models/UserProfile.cs

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+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace HotlinePlanner.Models
+{
+    [Table("UserProfiles")]
+    public class UserProfile
+    {
+        [Key]
+        public string UserId { get; set; } = string.Empty;
+        
+        public string? UserEmail { get; set; }
+        
+        public string? PictureBase64 { get; set; }
+        
+        public DateTime LastUpdated { get; set; }
+    }
+}