Changes to Create a deep search

added the non-success response with the status 403

added the optional property code to the response with the 400 status

added the optional property code to the response with the 404 status

added the optional property code to the response with the 500 status

the response property scope became nullable for the status 200

the scope request property default value segment was removed

added the new optional request property knowledge_base/oneOf[#/components/schemas/DeepSearchKBCollections]/filter/allOf[#/components/schemas/SearchFilter]/source_metadata

endpoint added