Scenario: findAll() for 3 orders (2 items each), then read .getItems().size()
on each in a loop — the pattern that looks completely ordinary in a service
method.

 1. select o1_0.id,o1_0.customer_id,o1_0.version from jpa_order o1_0
 2. select i1_0.order_id,i1_0.id,i1_0.quantity,i1_0.sku from jpa_order_item i1_0 where i1_0.order_id=?
 3. select i1_0.order_id,i1_0.id,i1_0.quantity,i1_0.sku from jpa_order_item i1_0 where i1_0.order_id=?
 4. select i1_0.order_id,i1_0.id,i1_0.quantity,i1_0.sku from jpa_order_item i1_0 where i1_0.order_id=?

total statements: 4

SELECT statements observed: 4  (1 for the orders themselves + 1 per order for
its lazily-loaded items = N+1, here 1 + 3 = 4)