refactor(EnvelopeReceiver): TFAEnabled wurde in die Envelope-Tabelle für Entität und DTO verschoben.

- Aktualisierte zugehörige Felder in HomeController.

EnvelopeGenerator.Domain/Entities/EnvelopeReceiverBase.cs

@@ -45,10 +45,7 @@ namespace EnvelopeGenerator.Domain.Entities
         [StringLength(20)]
         [RegularExpression(@"^\+[0-9]+$", ErrorMessage = "Phone number must start with '+' followed by digits.")]
         public string? PhoneNumber { get; set; }
-
-        [Column("TFA_ENABLED", TypeName = "bit")]
-        public bool TFAEnabled { get; set; }
-
+        
         [NotMapped]
         public (int Envelope, int Receiver) Id => (Envelope: EnvelopeId, Receiver: ReceiverId);