Open member free-lane for chat initiation; auto-claim on author view;
harden lease persist/ownership with readable DOC_BUSY; add notification
inbox and supplement-impact HTTP decision APIs wired to composition root.
Selected documents return to drafting, and advance asks the creator to acknowledge an open recheck mark.
Co-authored-by: Cursor <cursoragent@cursor.com>
Surface the document duty mode on submit/review/approve transitions for
consistent logs under author_only.
Co-authored-by: Cursor <cursoragent@cursor.com>
weichen