Add AutoMapper auditing extensions for timestamp fields

Introduced AutoMapperAuditingExtensions with MapAddedWhen and MapChangedWhen methods to standardize mapping of auditing timestamps. Refactored MappingProfile to use these extensions for AddedWhen and ChangedWhen fields, improving code clarity. Updated DocumentStatus to implement auditing interfaces and added necessary imports.

EnvelopeGenerator.Application/DocStatus/MappingProfile.cs

@@ -1,4 +1,5 @@
 using AutoMapper;
+using EnvelopeGenerator.Application.Common.Extensions;
 using EnvelopeGenerator.Application.DocStatus.Commands;
 using EnvelopeGenerator.Domain.Entities;
 
@@ -16,10 +17,12 @@ public class MappingProfile : Profile
     {
         CreateMap<CreateDocStatusCommand, DocumentStatus>()
         .ForMember(dest => dest.Envelope, opt => opt.Ignore())
-        .ForMember(dest => dest.Receiver, opt => opt.Ignore());
+        .ForMember(dest => dest.Receiver, opt => opt.Ignore())
+        .MapAddedWhen();
 
         CreateMap<UpdateDocStatusCommand, DocumentStatus>()
         .ForMember(dest => dest.Envelope, opt => opt.Ignore())
-        .ForMember(dest => dest.Receiver, opt => opt.Ignore());
+        .ForMember(dest => dest.Receiver, opt => opt.Ignore())
+        .MapChangedWhen();
     }
 }