feat: Sites feature backend

internal/infrastructure/persistence/models/articleModel.go

@@ -12,6 +12,7 @@ type Article struct {
 	Title     string
 	Body      string
 	IsOnline  bool      `gorm:"not_null;default:false"`
+	SiteID    uint32    `gorm:"index"`
 	CreatedAt time.Time `gorm:"autoCreateTime"`
 	UpdatedAt time.Time `gorm:"autoUpdateTime"`
 }