Fix error when the product was delete

[W4U-TOURS]

How to reproduce the issue

Environment

• PrestaShop version: 1.7.x / 8.x
• ps_facebook module version: latest
• PHP version: 7.4+

Steps to reproduce

1. Install and configure the ps_facebook module with Facebook Pixel
2. Create a product in your PrestaShop catalog
3. Make sure the product is synced with Facebook catalog
4. Delete the product from PrestaShop admin panel
5. Try to access the deleted product's URL directly (or from a Facebook ad/link)

Current behavior (bug)

PHP Fatal error: Uncaught TypeError: ProductControllerCore::addProductCustomizationData():
Argument #1 ($product_full) must be of type array, bool given

Expected behavior

The page should handle the deleted product gracefully (show 404 or redirect).

Root cause

When ProductControllerCore::getTemplateVarProduct() is called for a deleted product, it returns false instead of an array. The module's EventDataProvider tries to use this value without checking if the product exists, causing a TypeError.

Solution implemented

Added validation to check if the product exists and is loaded before calling getProductPageData():

• Check if id_product parameter exists
• Load the product object
• Validate with Validate::isLoadedObject() before proceeding
• Only call getProductPageData() if the product is valid

This prevents the fatal error when accessing deleted product pages.

[kseghair]

Hello @W4U-TOURS and thank you for your contribution.
Please fix the CI before we can review this PR and provide clear explanation on how to reproduce the issue.

[ga-devfront]

@W4U-TOURS CI is now fixed you can juste rebase your PR from master.