Find overdue Intacct customers with open BigCommerce orders

**Objective:** Find Intacct customers owing at least `{min-total-due}` (default 1000) who have BigCommerce orders in the last `{lookback-days}` days (default 30), so credit can be reviewed before more is shipped.

**Step 1: Read debtors from Intacct**

Call `intacct-get-customer` (intacct server) with `total-due.min` set to `{min-total-due}` and `status` set to active. Keep `customer-id`, `customer-name`, `total-due`, `credit-limit`, `term` and `last-invoice-date`. If more than 30 come back, work on the 30 with the largest `total-due`.

**Step 2: Check each in BigCommerce**

For each debtor call `bigcommerce-get-customer` (bigcommerce server) with `company.contains` set to the `customer-name`; if nothing comes back, try `name.contains`. Skip debtors with no match and count them as not in the store.

**Step 3: Read their recent orders**

For each matched customer call `bigcommerce-get-order` (bigcommerce server) with `customer-id` set to the BigCommerce id and `date-created.from` set to the start of the window. Keep orders whose `status` is not Shipped, Completed, Cancelled or Refunded, and note `payment-status`.

**Step 4: Report**

Show a table of customers with open orders: Intacct customer, total due, credit limit, open order count, open order value and oldest open order date. Put customers over their credit limit first. Finish with the count of debtors not in the store and debtors with no open orders.

**Rules & Guidelines:**

* `bigcommerce-get-customer` and `bigcommerce-get-order` are on the bigcommerce server. `intacct-get-customer` is on the intacct server.
* This prompt only reads and never holds, cancels or changes an order. Never call any `bigcommerce-customer-add`, `bigcommerce-customer-update`, `bigcommerce-customer-delete`, `bigcommerce-product-add`, `bigcommerce-product-update` or other bigcommerce add, update or delete tool, and never call `intacct-create-customer`, `intacct-update-customer`, `intacct-create-vendor`, `intacct-create-order-entry-document`, `intacct-update-order-entry-document` or any other Intacct create or update tool.
* Names are matched case-insensitively. When more than one store customer matches, list them and do not guess.

**Validation:**

* If Intacct returns no debtors above the threshold, say so and stop.
* Mention when amounts are in different currencies and do not compare them.