We're evaluating whether to move our existing Magento storefront to Hyvä, but we haven't decided how to approach the migration yet. The store has a large product catalog, custom integrations and several features that are important for daily operations. We need to preserve these while improving the frontend experience and avoiding unnecessary downtime. For businesses that have completed a similar transition, what were the biggest technical challenges, and how did you choose a team to manage the migration from start to finish?