Refactor: Rename SignatureDto to DocReceiverElementDto

Renamed `SignatureDto` to `DocReceiverElementDto` across the codebase to better reflect its purpose as a DTO for document receiver elements.

Updated all references, including:
- `SignatureController.cs`: Changed `doc.Elements` type to `IEnumerable<DocReceiverElementDto>`.
- `DocumentDto.cs`: Updated `Elements` property type.
- `MappingProfile.cs`: Adjusted mappings for the renamed DTO.
- `IDocumentReceiverElementService.cs` and `DocumentReceiverElementService.cs`: Updated interfaces and services to use the new DTO.
- `TestDocumentReceiverElementController.cs`: Updated generic type parameters.

These changes improve clarity, align naming with the domain model, and ensure consistency throughout the application.

EnvelopeGenerator.Application/Common/Dto/DocReceiverElementDto.cs

@@ -9,7 +9,7 @@ namespace EnvelopeGenerator.Application.Common.Dto;
 /// Data Transfer Object representing a positioned element assigned to a document receiver.
 /// </summary>
 [ApiExplorerSettings(IgnoreApi = true)]
-public class SignatureDto : IDocReceiverElement
+public class DocReceiverElementDto : IDocReceiverElement
 {
     /// <summary>
     /// Gets or sets the unique identifier of the element.

EnvelopeGenerator.Application/Common/Dto/DocumentDto.cs

@@ -31,5 +31,5 @@ public class DocumentDto
     /// <summary>
     /// Gets or sets the collection of elements associated with the document for receiver interactions, if any.
     /// </summary>
-    public IEnumerable<SignatureDto>? Elements { get; set; }
+    public IEnumerable<DocReceiverElementDto>? Elements { get; set; }
 }

EnvelopeGenerator.Application/Common/Dto/MappingProfile.cs

@@ -23,7 +23,7 @@ public class MappingProfile : Profile
     {
         // Entity to DTO mappings
         CreateMap<Config, ConfigDto>();
-        CreateMap<DocReceiverElement, SignatureDto>();
+        CreateMap<DocReceiverElement, DocReceiverElementDto>();
         CreateMap<DocumentStatus, DocumentStatusDto>();
         CreateMap<EmailTemplate, EmailTemplateDto>();
         CreateMap<Envelope, EnvelopeDto>();
@@ -39,7 +39,7 @@ public class MappingProfile : Profile
 
         // DTO to Entity mappings
         CreateMap<ConfigDto, Config>();
-        CreateMap<SignatureDto, DocReceiverElement>();
+        CreateMap<DocReceiverElementDto, DocReceiverElement>();
         CreateMap<DocumentStatusDto, DocumentStatus>();
         CreateMap<EmailTemplateDto, EmailTemplate>();
         CreateMap<EnvelopeDto, Envelope>();

EnvelopeGenerator.Application/Common/Interfaces/Services/IDocumentReceiverElementService.cs

@@ -8,6 +8,6 @@ namespace EnvelopeGenerator.Application.Common.Interfaces.Services;
 /// 
 /// </summary>
 [Obsolete("Use MediatR")]
-public interface IDocumentReceiverElementService : IBasicCRUDService<SignatureDto, DocReceiverElement, int>
+public interface IDocumentReceiverElementService : IBasicCRUDService<DocReceiverElementDto, DocReceiverElement, int>
 {
 }