feat(sync) : add version field and PieceProductSlot entity

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

src/Entity/Piece.php

@@ -114,12 +114,23 @@ class Piece
     #[ORM\InverseJoinColumn(name: 'product_id', referencedColumnName: 'id', onDelete: 'CASCADE')]
     private Collection $products;
 
+    /**
+     * @var Collection<int, PieceProductSlot>
+     */
+    #[ORM\OneToMany(targetEntity: PieceProductSlot::class, mappedBy: 'piece', cascade: ['persist', 'remove'], orphanRemoval: true)]
+    #[ORM\OrderBy(['position' => 'ASC'])]
+    private Collection $productSlots;
+
     /**
      * @var Collection<int, MachinePieceLink>
      */
     #[ORM\OneToMany(mappedBy: 'piece', targetEntity: MachinePieceLink::class)]
     private Collection $machineLinks;
 
+    #[ORM\Column(type: Types::INTEGER, options: ['default' => 1])]
+    #[Groups(['piece:read'])]
+    private int $version = 1;
+
     #[ORM\Column(type: Types::DATETIME_IMMUTABLE, name: 'createdAt')]
     #[Groups(['piece:read'])]
     private DateTimeImmutable $createdAt;
@@ -136,6 +147,7 @@ class Piece
         $this->documents         = new ArrayCollection();
         $this->customFieldValues = new ArrayCollection();
         $this->products          = new ArrayCollection();
+        $this->productSlots      = new ArrayCollection();
         $this->machineLinks      = new ArrayCollection();
     }
 
@@ -287,4 +299,41 @@ class Piece
 
         return $this;
     }
+
+    /**
+     * @return Collection<int, PieceProductSlot>
+     */
+    public function getProductSlots(): Collection
+    {
+        return $this->productSlots;
+    }
+
+    public function addProductSlot(PieceProductSlot $slot): static
+    {
+        if (!$this->productSlots->contains($slot)) {
+            $this->productSlots->add($slot);
+            $slot->setPiece($this);
+        }
+
+        return $this;
+    }
+
+    public function removeProductSlot(PieceProductSlot $slot): static
+    {
+        $this->productSlots->removeElement($slot);
+
+        return $this;
+    }
+
+    public function getVersion(): int
+    {
+        return $this->version;
+    }
+
+    public function incrementVersion(): static
+    {
+        ++$this->version;
+
+        return $this;
+    }
 }