feat: streamlined booking number property

src/Entity/BookingEditDraft.php

@@ -22,9 +22,18 @@ class BookingEditDraft
     #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
     private User $user;
 
+    /**
+     * Internal database ID (BPN XML: idbuchung).
+     */
     #[ORM\Column(type: 'integer')]
     private int $bookingId;
 
+    /**
+     * User-facing transaction number (BPN XML: vorgang).
+     */
+    #[ORM\Column(type: 'integer', nullable: true)]
+    private ?int $bookingNumber = null;
+
     #[ORM\Column(type: 'date_immutable')]
     private \DateTimeImmutable $travelDate;
 
@@ -62,6 +71,18 @@ class BookingEditDraft
         return $this->bookingId;
     }
 
+    public function getBookingNumber(): ?int
+    {
+        return $this->bookingNumber;
+    }
+
+    public function setBookingNumber(?int $bookingNumber): static
+    {
+        $this->bookingNumber = $bookingNumber;
+
+        return $this;
+    }
+
     public function getTravelDate(): \DateTimeImmutable
     {
         return $this->travelDate;