Enhanced mapping logic in MappingProfile:
- Set Status to Created or Signed in CreateDocStatusCommand mapping based on Value property.
- Automatically set StatusChangedWhen to current UTC time in UpdateDocStatusCommand mapping.
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.
