Patch Document

Sections in the template's order, every one present (hidden ones too).

body is the clinician's markdown once they leave review for the editor; null while the draft is in review. From then on sections are the reviewed AI version, kept as the audit snapshot, and body_seed_sha is the sha256 of the markdown start_edit built, so Back to review is offered only while nothing has been typed.

The sign-off every rendering ends with: the signer (the finaliser, or a draft's author), their discipline on the client's care team, and the clinic. signed_on is the signer's local day; null until finalised.