feat(piece) : add quantity field to MachinePieceLink entity + migration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/Entity/MachinePieceLink.php

@@ -18,6 +18,7 @@ use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Validator\Constraints as Assert;
 
 #[ORM\Entity(repositoryClass: MachinePieceLinkRepository::class)]
 #[ORM\Table(name: 'machine_piece_links')]
@@ -68,6 +69,10 @@ class MachinePieceLink
     #[ORM\Column(type: Types::DECIMAL, precision: 10, scale: 2, nullable: true, name: 'prixOverride')]
     private ?string $prixOverride = null;
 
+    #[ORM\Column(type: Types::INTEGER, options: ['default' => 1])]
+    #[Assert\GreaterThanOrEqual(1)]
+    private int $quantity = 1;
+
     #[ORM\Column(type: Types::DATETIME_IMMUTABLE, name: 'createdAt')]
     private DateTimeImmutable $createdAt;
 
@@ -152,4 +157,16 @@ class MachinePieceLink
 
         return $this;
     }
+
+    public function getQuantity(): int
+    {
+        return $this->quantity;
+    }
+
+    public function setQuantity(int $quantity): static
+    {
+        $this->quantity = $quantity;
+
+        return $this;
+    }
 }