"alarms" jsonb, -- if not null, will contain a JSON array of string elements. see alarms section
"scheduled"booleanNOT NULL, -- false for measurements that are not part of the regular reporting interval, eg. directly after command execution and at Teleport initialisation
"measured_at"timestamptzNOT NULL, -- when read-out started
"created_at"timestamptzNOT NULL-- when written to the table