Add support for fetching document metadata separately

Introduced a new `ReadDocumentDetailsQuery` to fetch document
metadata (`DocumentDetailsDto`) without the binary payload.
Updated `MappingProfile` to map `Document` to `DocumentDetailsDto`.

Refactored `DocumentService` to handle separate fetching of
metadata and binary data, combining them into `DocumentDto`.
Changed the metadata endpoint to `/api/Document/details`.

Added a new `GetDocumentDetails` endpoint in `DocumentController`
to return metadata without binary data. Updated
`EnvelopeReceiverPageDataService` with a new method
`GetDocumentMetadataOfSenderAsync` for fetching metadata.

These changes improve efficiency by allowing clients to load
metadata without transferring large binary data when unnecessary.

EnvelopeGenerator.Application/Common/MappingProfile.cs

@@ -32,6 +32,7 @@ public class MappingProfile : Profile
             .ForMember(dest => dest.EnvelopeTypeTitle,
                        opt  => opt.MapFrom(src => src.Type != null ? src.Type.Title : null));
         CreateMap<Document, DocumentDto>();
+        CreateMap<Document, DocumentDetailsDto>();
         CreateMap<History, HistoryDto>().ForMember(dest => dest.ActionDate, opt => opt.MapFrom(src => src.ChangedWhen));
         CreateMap<History, HistoryCreateDto>().ForMember(dest => dest.ActionDate, opt => opt.MapFrom(src => src.ChangedWhen));
         CreateMap<EnvelopeReceiver, EnvelopeReceiverDto>();
@@ -68,4 +69,4 @@ public class MappingProfile : Profile
                 ? new SmsResponse() { Ok = true }
                 : new SmsResponse() { Ok = false, Errors = gtxRes });
     }
-}
+}