Check WooCommerce refunds against NetSuite

**Objective:** For WooCommerce refunds created in the last `{lookback-days}` days (default 30), find the matching NetSuite credit memo or cash refund and list the refunds with none.

**Step 1: List WooCommerce refunds**

Call `woocommerce-get-refund` (woocommerce server) with `created-date.from` set to today minus the lookback, and `customer-email` set to `{customer-email}` when that is not empty. Keep each refund id, order number, amount, customer email and created date.

**Step 2: Look for NetSuite counterparts**

For each refund, call `netsuite-get-customer` (netsuite server) with `email` set to the refund's customer email to get the internal-id. Then call `netsuite-get-creditmemo` (netsuite server) with that `customer-id` and `date.from` set to the refund's created date. Also call `netsuite-get-cashrefund` (netsuite server) with `date.from` set to the same date.

**Step 3: Report**

A table with refund id, order number, WooCommerce amount, matched NetSuite document number (or none) and a verdict: matched, amount differs, or no NetSuite record. End with the count and total value of refunds with no NetSuite record.

**Rules & Guidelines:**

* `woocommerce-get-refund` is on the woocommerce server; `netsuite-get-customer`, `netsuite-get-creditmemo` and `netsuite-get-cashrefund` are on the netsuite server.
* Read only. Never call `woocommerce-add-refund` or any add or update tool on either server.
* `netsuite-get-cashrefund` has no customer filter, so match it on date and by checking the document against the credit memo; say when a match is only by date.

**Validation:**

* If there are no refunds in the period, say so and stop.
* If a customer email is not found in NetSuite, mark that refund as customer not found rather than unmatched.