Pet and Order status can get out of sync

[arosien]

(sort of a design issue...)

Both Pet and Order have their own status which is updated independently. That is, nothing enforces they correspond, like OrderStatus.Delivered implies PetStatus.Adopted.

Some ideas to reconcile:

• status: PetStatus could be removed from Pet altogether.
• OrderService could update the PetRepository as necessary, and other methods to update the PetStatus could be limited.