Find Shopify refunds with no Business Central credit memo

**Objective:** For every Shopify refund created between `{from-date}` (default 30 days ago) and `{to-date}` (default today), find the posted sales credit memo in Business Central and report refunds with no credit memo or a different amount.

**Step 1: Read the Shopify refunds**

Call `shopify-get-refund` with `created-at.from` set to `{from-date}` and `created-at.to` set to `{to-date}`, and `max-records` 250. Keep `refund-id`, `order-id`, `order-name`, `order-number`, `customer-email`, `created-at`, `restock` and `note`.

For each refund, call `shopify-get-refund-line` with `order-refund-id` set to the `refund-id`. The refunded amount is the sum of each line's `subtotal` plus `total-tax`. Keep the lines (`sku`, `quantity`, `restock-type`) for the report. A refund with no lines is an amount-only refund; note it.

**Step 2: Find the credit memo in Business Central**

Call `business-central-get-posted-sales-credit-memo` with `external-document-number` set to the Shopify `order-name`. If nothing comes back, retry with the `order-number` alone. Keep `credit-memo-number`, `posting-date`, `total-amount-including-tax`, `applies-to-document-number`, `paid` and `cancelled`. Ignore cancelled credit memos.

One order can have several refunds and several credit memos. Match them by amount first, then by date. Any left over on either side are unmatched.

**Step 3: Report**

A table of problems: Shopify order name, refund date, Shopify refunded amount, Business Central credit memo number (or none), credit memo amount, difference. Put refunds with no credit memo first, then amount differences.

Then totals: refunds checked, matched, missing in Business Central, amount differences, and the total refunded value on each side.

**Rules & Guidelines:**

* `shopify-get-refund` and `shopify-get-refund-line` are on the shopify server. `business-central-get-posted-sales-credit-memo` is on the business-central server.
* This prompt is read-only. Do NOT call `business-central-create-sales-credit-memo`, `business-central-create-sales-credit-memo-line` or any other create, add or update tool on either server.
* If the user names a Business Central company, pass it as `company` on every Business Central call.

**Validation:**

* If there are no refunds in the range, say so and stop.
* Compare amounts rounded to 2 decimals. A difference of 0.01 is a rounding difference; list it but say so.
* If no refund matches any credit memo, say Business Central may reference the refund in a different field and show one example with the values you tried, rather than reporting everything as missing.