Where this project's devices send UDP datagrams, and how one is laid out (any member)

The static anycast addresses and port to send to — these never change, so a device hard-codes one. hostname is published too when this deployment has one configured, but it is optional and DNS-only: devices that cannot resolve DNS (most hardware senders) use addresses directly. A datagram is device_id (8) ‖ nonce (nonce_len) ‖ payload ‖ tag (tag_len) and carries NO version, length or delimiter: the widths come from the device's own row, which is why they are published here. The ACK is nonce ‖ status (1) ‖ tag, where status is 0 stored, 1 throttled, 2 disabled. provisioned is false where no listener is configured; the suite table is published either way so a device can be prepared first. rejects_retention is how long a parked datagram stays readable before the prune pass removes it.