ecfbfcc707
what: - adds variant inventory link management endpoints: ``` Link inventory item to variant POST /products/:id/variants/:vid/inventory-items Update variant's inventory item link POST /products/:id/variants/:vid/inventory-items/:iid Unlink variant's inventory item DELETE /products/:id/variants/:vid/inventory-items/:iid ``` - a batch endpoint that does the above 3 across variants ``` POST /products/:id/variants/inventory-items ```