Derives the author from the most recent EDITS_REQUESTED / REJECTED /
APPROVED action that carries a note. PO detail banner now shows 'Note from
[name]', edit-page banner shows 'Edits requested by [name]', and the
closed-orders list prefixes the truncated note with the author's name.
No schema changes required - uses the already-fetched actions with actor.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
PO_SUBMITTED: managers only, submitter no longer copied
PAYMENT_SENT: submitter only (it is a receipt prompt, not a manager action)
PARTIAL_RECEIPT_CONFIRMED: managers now notified via new event type
RECEIPT_CONFIRMED: unchanged (managers + accounts)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
