diff.apply

Apply a previously computed diff payload to the current document. The document fingerprint must match the diff base fingerprint. Omitted changeMode applies story content directly; explicit tracked mode governs all four story families (body, header/footer parts, footnotes, endnotes). Comments, styles, and numbering are always applied directly. Supported mixed full-diff payloads apply atomically across body, comments, styles, numbering, and header/footers. Unsupported/deferred families such as package-graph/media/hyperlink closure, settings/theme, and textboxes fail closed before mutation.