Complete rework of packet parsing and packet generation

app/Models/System.php

@@ -251,12 +251,15 @@ class System extends Model
 	/**
 	 * Return the packet that this system uses
 	 *
+	 * @param Address $ao
 	 * @return Packet
 	 */
-	public function packet(): Packet
+	public function packet(Address $ao): Packet
 	{
-		return new (collect(Packet::PACKET_TYPES)
-			->get($this->pkt_type ?: config('fido.packet_default')));
+		// @todo Check that the address is one of the system's addresses
+
+		return (new (collect(Packet::PACKET_TYPES)
+			->get($this->pkt_type ?: config('fido.packet_default'))))->for($ao);
 	}
 
 	public function poll(): ?Job