Frequently Bought Together Pairs

Apple's online store wants to power a 'Frequently Bought Together' shelf. Find every pair of different products that were purchased together in the same order in at least 2 distinct orders. Each pair must appear only once (do not return both A-B and B-A, and do not pair a product with itself). Return `product_a` and `product_b` (the product names, where product_a is the product with the smaller `product_id`) and `pair_orders` (the number of distinct orders containing both). Order the results by `pair_orders` descending, then by the smaller product's `product_id` ascending, then by the larger product's `product_id` ascending.