feat(product): formalize product data contract and decouple from assessments#23359

FAMarfuaty wants to merge 4 commits into

634-api-migration-define-a-serializable-paperkeyphrase-input-contract-for-non-wordpress-consumersYoast/wordpress-seo:634-api-migration-define-a-serializable-paperkeyphrase-input-contract-for-non-wordpress-consumersfrom

657-api-migration-formalize-the-product-customdata-contract-and-decouple-producttype-from-the-e-commerce-assessmentsYoast/wordpress-seo:657-api-migration-formalize-the-product-customdata-contract-and-decouple-producttype-from-the-e-commerce-assessmentsCopy head branch name to clipboard