Amazon-related sales screens now show the Amazon order reference in key views, making it easier for users to find and track marketplace orders. Account and delivery order pages also display clear status badges, helping teams quickly see whether an Amazon account is linked and whether a delivery is waiting for Amazon synchronization.

This commit adds:
- the field `amazon_order_ref` in the list, form and search views,
- a badge "Linked Account" or "Unlinked Account" on the form view of
  Amazon accounts,
- a badge "Waiting Amazon Synchronization" on the form view of delivery
  orders.

task-2806571