Added the product name property in member reads
Added the product name property in member reads

refs https://github.com/TryGhost/Team/issues/1141

- The goal is to retrieve the product name for canceled subscriptions
- The property is located at `member.subscriptions.price.product.name`
- We can't easily get the full product as products are retrieved using a join through `members_products`, and there is only a `members_products` row when the subscription is active

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