See a customer's orders and billing in one view

**Objective:** Build one view of the customer with email `{email}` across BigCommerce and FreshBooks: what they ordered, what was invoiced, what was paid and what is still owed.

**Step 1: Find the BigCommerce customer**

Call `bigcommerce-get-customer` (bigcommerce server) with `email` set to `{email}`. If nothing matches, try `email.contains`. If more than one customer matches, list them and stop.

**Step 2: Read their orders**

Call `bigcommerce-get-order` (bigcommerce server) with `customer-id` set to the customer `id`, `max-records` 50. Keep `id`, `date-created`, `status`, `payment-status`, `total-including-tax`, `refunded-amount`. If the customer has no orders, also try `billing-email` set to `{email}`.

**Step 3: Find the FreshBooks client**

Call `freshbooks-get-client` (freshbooks server) with `email` set to `{email}`. If there is no client, report the BigCommerce side only and say the customer is not in FreshBooks.

**Step 4: Read invoices and payments**

Call `freshbooks-get-invoice` with `customer-id` set to the client `id`, then `freshbooks-get-payment` with `client-id` set to the client `id`. Total the invoice `amount`, the `outstanding` and the payment `amount`.

**Step 5: Report**

Three sections: customer identity on both systems (ids, names, company), orders with dates and totals, invoices and payments with the outstanding balance. Finish with one sentence on anything that does not line up, such as paid orders with unpaid invoices.

**Rules & Guidelines:**

* `bigcommerce-get-customer` and `bigcommerce-get-order` are on the bigcommerce server. `freshbooks-get-client`, `freshbooks-get-invoice` and `freshbooks-get-payment` are on the freshbooks server.
* Read-only. Never call any add, update, delete, send or mark tool on either server.

**Validation:**

* If the email matches on neither system, say so and stop.
* If the two systems hold different names for the same email, show both and do not choose.