new app server and database + added hub and controller of user profile

Govor.Core/Models/MediaFile.cs

@@ -10,4 +10,15 @@ public class MediaFile
     public MediaType MediaType { get; set; }
     public string MineType { get; set; }
     public DateTime DateCreated { get; set; }
+
+    public MediaOwnerType OwnerType { get; set; } = MediaOwnerType.Message;
+    public Guid? OwnerId { get; set; }
+}
+
+public enum MediaOwnerType
+{
+    Message = 0,   
+    Avatar = 1,    
+    GroupAvatar = 2, 
+    System = 3     // (Emoge, icons è e.t.c)
 }

Govor.Core/Models/Users/UserSession.cs

@@ -11,7 +11,8 @@ public class UserSession
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
     public DateTime ExpiresAt { get; set; }
     public bool IsRevoked { get; set; } = false;
-    
+    // public DateTime? RevokedAt { get; set; } TODO: Clear old UserSessions 
+
     public UserCryptoSession CryptoSession { get; set; }
 
     public override bool Equals(object? obj)