Resoved to be 1). Least effort, maximum reach compatibility-wise:
{ type: 'Note', attributedTo: me, to,
'shaer:helpPickup': noteUri,| 'shaer:helpHandled': noteUri,
content: 'Ik kijk hiernaar.' | content: 'Deze hulpvraag is afgehandeld' }
Immediately parsable by any (Dutch 
) consumer.