feat(patients): service quantity in visit session

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Patient/Entity/SessionService.php

@@ -35,16 +35,20 @@ class SessionService
     #[ORM\Column(name: 'price_rials', type: 'integer')]
     private int $priceRials;
 
+    #[ORM\Column(type: 'integer')]
+    private int $quantity = 1;
+
     #[ORM\Column(name: 'created_at', type: 'integer')]
     private int $createdAt;
 
-    public function __construct(PatientSession $session, ServiceItem $serviceItem, ?ClinicStaff $staff = null)
+    public function __construct(PatientSession $session, ServiceItem $serviceItem, ?ClinicStaff $staff = null, int $quantity = 1)
     {
         $this->uuid        = Uuid::v4()->toRfc4122();
         $this->session     = $session;
         $this->serviceItem = $serviceItem;
         $this->staff       = $staff;
         $this->priceRials  = $serviceItem->getPriceRials();
+        $this->quantity    = max(1, $quantity);
         $this->createdAt   = time();
     }
 
@@ -54,6 +58,8 @@ class SessionService
     public function getServiceItem(): ServiceItem { return $this->serviceItem; }
     public function getStaff(): ?ClinicStaff   { return $this->staff; }
     public function getPriceRials(): int        { return $this->priceRials; }
+    public function getQuantity(): int          { return $this->quantity; }
+    public function getLineTotalRials(): int    { return $this->priceRials * $this->quantity; }
     public function getCreatedAt(): int         { return $this->createdAt; }
 
     public function toArray(): array
@@ -65,6 +71,8 @@ class SessionService
             'staff_uuid'        => $this->staff?->getUuid(),
             'staff_name'        => $this->staff?->getFullName(),
             'price_rials'       => $this->priceRials,
+            'quantity'          => $this->quantity,
+            'line_total_rials'  => $this->getLineTotalRials(),
             'created_at'        => $this->createdAt,
         ];
     }