Credit every WooCommerce refund on the right Rillet invoice

**Objective:** For each WooCommerce refund made from `{from-date}` to `{to-date}` (default: the last 7 days), create a Rillet credit memo against the Rillet product `{rillet-product-name}` and apply it to the order's Rillet invoice, after the user confirms.

**Step 1: Read the WooCommerce refunds**

Call `woocommerce-get-refund` with created-date.from and created-date.to set to the range. Note refund-id, order-id, order-number, created-date, amount, reason, refunded-payment and customer-email. Use the amount as a positive number whatever its sign.

For detail, call `woocommerce-get-refund-line` filtered by refund-id and note line-item-name, line-item-quantity, line-item-total and line-item-total-tax.

**Step 2: Find the Rillet invoice and any existing memo**

Call `rillet-get-invoices` (no filters) and find the invoice whose invoice-number equals the order-number, with or without a leading #, or equals the order-id. Then call `rillet-get-credit-memos` filtered by credit-memo-number R- followed by the refund-id. If one exists, the refund is already booked. Skip it.

**Step 3: Resolve the product**

Call `rillet-get-products` and find the product whose name equals `{rillet-product-name}`. If none or more than one matches, list the candidates and stop.

**Step 4: Confirm**

Show a table: order-number, refund-id, refund date, amount, currency (from the invoice), reason, invoice-number, invoice amount-due, and the lines refunded. Flag any refund whose refunded-payment shows the money was not returned through the payment gateway, so the user knows it was refunded by hand. List separately the refunds with no Rillet invoice, and those already booked. Ask the user to confirm. Create nothing until they do.

**Step 5: Create and apply**

For each confirmed refund:

1. Call `rillet-add-credit-memo` once with customer-id (from the invoice), credit-memo-date (the refund date), credit-memo-number R- followed by the refund-id, line1-product-id, line1-quantity 1, line1-unit-amount the refund amount, line1-currency the invoice currency, and line1-description WooCommerce refund followed by the order-number and the reason if there is one.
2. If the invoice amount-due is above 0, call `rillet-apply-credit-memo` once with id (the new memo id), line1-invoice-id, line1-amount (the refund amount, capped at the invoice amount-due), line1-currency and line1-date (the refund date). If amount-due is 0, leave the memo unapplied and say the invoice was already paid, so the cash refund needs recording separately.

**Step 6: Report**

Memos created, and whether each was applied and for how much, with their ids. Any step that failed with the error as returned. The skipped refunds. Note that each memo carries the gross refunded amount, tax included, on one line.

**Rules & Guidelines:**

* `woocommerce-get-refund` and `woocommerce-get-refund-line` are on the woocommerce server. `rillet-get-invoices`, `rillet-get-credit-memos`, `rillet-get-products`, `rillet-add-credit-memo` and `rillet-apply-credit-memo` are on the rillet server.
* The only write tools this prompt may call are `rillet-add-credit-memo` and `rillet-apply-credit-memo`, once each per confirmed refund. Apply only a memo this prompt just created: `rillet-apply-credit-memo` replaces a memo's existing applications.
* Do not call `rillet-update-credit-memo`, `rillet-unapply-credit-memo`, `rillet-update-invoice`, `woocommerce-add-refund` or any other woocommerce write tool. The refund already exists in WooCommerce.

**Validation:**

* If there are no refunds in the range, say so and stop.
* If a refund's order has no Rillet invoice, do not book it. Suggest running backfill-woocommerce-orders first.
* If the credit memo is created but applying it fails, report the memo id as created but unapplied. Do not create a second memo.
* If the user does not confirm, create nothing.