Changes to Retrieve an individual watchlist screening

added the new retro enum value to the audit_trail/source response property for the response status 200

the client_user_id response property's minLength was decreased from 1 to 0 for the response status 200

the search_terms/country response property's minLength was decreased from 2 to 0 for the response status 200

the search_terms/document_number response property's minLength was decreased from 4 to 0 for the response status 200

the search_terms/legal_name response property's minLength was decreased from 1 to 0 for the response status 200