re write section

RE comment 1) Will address this with FHIR-37243 RE comment 2) Remove capital case conformance Verbs ( SHALL, SHOULD ) and replace with declarative sentences  for business rules in attachments, direct-query and task-based approach signature sections :   e.g.,   Change The signature SHALL represent a human provider signature on resources attesting that the information is true and accurate. If the signature requirement is pre-negotiated, it SHALL be assumed that all attachments will be signed. Conversely, it SHOULD be assumed that no CDex Attachments transaction will be signed unless there exists a pre- negotiated agreement   to  The signature represents a human provider signature on resources attesting that the information is true and accurate, to the best of their knowledge.(footnote) It is assumed that all attachments will be signed. Conversely, it is assumed that no CDex Attachments transaction will be signed unless there exists a pre-negotiated agreement add boilerplate footnote or note : "Consult with your payer and your legal team for questions reqarding legal liability associated with sharing and signing data."