Import feedback system

[mmenozzi]

Now that we use Symfony Messenger as queue engine we lost the ability to show failed queue items to allow the merchant to review import errors.

So, we should implement a system that allows the merchant to review import jobs status.

[mmenozzi]

We decided to implement this by injecting a special Logger in the ItemImportHandler which should log any exception thrown during the import process. This special Logger should be configured with a "DoctrineORMHandler" which will persist logs as a new Log entity that will be configured as Sylius resource with dedicated grid in the backend.

• Implement monolog DoctrineORMHandler and Log entity as described here.
• Inject a custom logger configured with the DoctrineORMHandler in the ItemImportHandler and log any exception/error or success result
• Configure the Log entity as a Sylius resource with the dedicated grid in backend