feat(EnvelopeReceiverBase): HasPhoneNumber-Eigenschaft sowohl zur Entität als auch zum DTO hinzugefügt

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverBasicDto.cs

@@ -25,5 +25,7 @@ namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver
         public DateTime AddedWhen { get; init; }
 
         public DateTime? ChangedWhen { get; init; }
+
+        public bool HasPhoneNumber { get; init; }
     }
 }

EnvelopeGenerator.Domain/Entities/EnvelopeReceiverBase.cs

@@ -46,6 +46,10 @@ namespace EnvelopeGenerator.Domain.Entities
         [RegularExpression(@"^\+[0-9]+$", ErrorMessage = "Phone number must start with '+' followed by digits.")]
         public string? PhoneNumber { get; set; }
 
+        [NotMapped]
         public (int Envelope, int Receiver) Id => (Envelope: EnvelopeId, Receiver: ReceiverId);
+
+        [NotMapped]
+        public bool HasPhoneNumber => PhoneNumber is not null;
     }
 }