See 2Checkout subscriptions beside unpaid NetSuite invoices

**Objective:** For the customer with email `{email}`, show active 2Checkout subscriptions and any unpaid NetSuite invoices, and flag customers who are still subscribed but owe money.

**Step 1: Subscriptions (2checkout server)**

Call `2checkout-get-subscription` with `end-user-email` = `{email}`. Note `subscription-reference`, `product-name`, `status`, `expiration-date` and `billing-currency`.

**Step 2: NetSuite balance (netsuite server)**

Call `netsuite-get-customer` with `email` = `{email}` and note `internal-id` and `balance`. Call `netsuite-get-invoice` with `customer-id` = that id and `unpaid-amount.min` = 0.01.

**Step 3: Report**

List subscriptions, then unpaid invoices (document-number, date, total, unpaid-amount), then the customer balance. Finish with a one-line risk call: subscribed and owing, subscribed and clear, or lapsed and owing.

**Rules & Guidelines:**

* `2checkout-get-subscription` is on the 2checkout server; `netsuite-get-customer` and `netsuite-get-invoice` are on the netsuite server.
* Read-only: do not call any 2checkout action tool (for example `2checkout-order-refund`, `2checkout-customer-update`, `2checkout-customer-add`) and do not call any netsuite add or update tool (for example `netsuite-add-customer`, `netsuite-update-customer`, `netsuite-add-invoice`).

**Validation:**

* If there is no NetSuite customer, say there is no receivable to compare.
* If there are no subscriptions, report only the NetSuite position.