Is it guaranteed that the `products/update` webhook will fire whenever any of its variants `inventory_quantity` changes for any reason?
Such as whenever a variant is bought/refunded (assuming inventory is tracked), whenever the variant's stocked quantity at any location changes, or any other reason?
You see, we must keep a local synchronized copy of the total inventory per variant in our local database.
Ideally, we would prefer to only have to listen to `products/update` and store the `variant.inventory_quantity` that we receive.
But we are wondering if we must also listen for `orders/create`, 'orders/refunded', 'orders/edited', 'inventory_level/update', etc..., and then query back into the products API when we receive those. Is it necessary?
Based on initial basic testing, it seems that products/update indeed fires whenever the inventory quantity changes.
However, it is critical for us to always be in sync perfectly, so I'd really love to get an official answer from someone at Shopify that could confirm. While our testing is looking promising, it seems impossible to test all possible scenarios, including potential programmatic changes done by other third party apps, POS scenarios and any other cases we might not think about.
Thank you in advance.
