bugs

Bug 1: Broken error message formatting in /pets/findByStatus
In the app, this line is wrong:
    api.abort(400, 'Invalid pet status {status}')
It should be:
    api.abort(400, f"Invalid pet status {status}")
Right now it returns the literal text {status} instead of the actual value.


Bug 2: PATCH assumes "status" always exists
This line:
    order['status'] = update_data['status']
Will raise a server error if the client sends {}. The API should validate that field before using it.


Bug 3: No GET endpoint for order lookup
You can create and patch orders, but there is no endpoint to fetch an order by ID. That limits test coverage and makes verification indirect.