refactor(AnnotationDto): split AnnotationDto into AnnotationCreateDto and AnnotationDto

- Introduced AnnotationCreateDto for creation-specific properties
- AnnotationDto now inherits from AnnotationCreateDto and includes Id, AddedWhen, ChangedWhen, and ChangedWho
- Added Type property to AnnotationCreateDto
 - remove CreateAnnotationCommand

EnvelopeGenerator.Application/Common/Dto/AnnotationDto.cs

@@ -3,13 +3,8 @@
 /// <summary>
 /// 
 /// </summary>
-public record AnnotationDto
+public record AnnotationCreateDto
 {
-    /// <summary>
-    /// 
-    /// </summary>
-    public long Id { get; init; }
-
     /// <summary>
     /// 
     /// </summary>
@@ -25,6 +20,22 @@ public record AnnotationDto
     /// </summary>
     public string Value { get; init; } = null!;
 
+    /// <summary>
+    /// 
+    /// </summary>
+    public string Type { get; init; } = null!;
+}
+
+/// <summary>
+/// 
+/// </summary>
+public record AnnotationDto : AnnotationCreateDto
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public long Id { get; init; }
+
     /// <summary>
     /// 
     /// </summary>

EnvelopeGenerator.Application/Common/Dto/MappingProfile.cs

@@ -51,6 +51,8 @@ public class MappingProfile : Profile
         CreateMap<ReceiverDto, Domain.Entities.Receiver>().ForMember(rcv => rcv.EnvelopeReceivers, rcvReadDto => rcvReadDto.Ignore());
         CreateMap<EnvelopeReceiverReadOnlyCreateDto, Domain.Entities.EnvelopeReceiverReadOnly>();
         CreateMap<EnvelopeReceiverReadOnlyUpdateDto, Domain.Entities.EnvelopeReceiverReadOnly>();
+        CreateMap<AnnotationCreateDto, Annotation>()
+            .ForMember(dest => dest.AddedWhen, opt => opt.MapFrom(_ => DateTime.UtcNow));
 
         // Messaging mappings
         // for GTX messaging