Reorder the WooCommerce items about to run out first

**Objective:** Find every product and variation at or below `{stock-threshold}` units (default 5) or out of stock, and rank them by how soon they will run out, based on sales over the last `{lookback-days}` days (default 30).

**Step 1: Pull low and out-of-stock items**

* `woocommerce-get-product` with `stock-quantity.max` = `{stock-threshold}` and `status` = `publish`.
* `woocommerce-get-product` with `stock-status` = `outofstock`, and again with `onbackorder`.
* `woocommerce-get-product-variation` with `stock-quantity.max` = `{stock-threshold}`, then with `stock-status` = `outofstock`, then `onbackorder`.

Merge by product id or `product-variation-id`. Drop products whose `type` is `variable`; their stock lives on the variations.

**Step 2: Measure demand**

Call `woocommerce-get-order-line` with `date-created.from` = today minus `{lookback-days}` days and `max-records` 2000. Keep only lines whose `order-status` is `processing`, `completed` or `on-hold`. Sum `line-quantity` per `line-sku`. Match items by SKU, because `line-product-id` can hold the parent product's id for a variation.

**Step 3: Rank**

* Daily velocity = units sold / `{lookback-days}`.
* Days of cover = `stock-quantity` / velocity. No sales means no cover figure: show "no recent sales".
* Order: out of stock with recent sales first (lost sales now), then lowest days of cover, then on backorder, then low stock with no recent sales.

**Step 4: Report**

A table with columns name, SKU, product or variation, stock status, quantity, units sold, velocity per day, days of cover. Then a short list of the 5 most urgent items and, as a separate note, items that are `instock` but have an empty `stock-quantity` (stock not tracked, so they can never show as low).

**Rules & Guidelines:**

* This prompt is read-only. Do not call any write tool: `woocommerce-add-order`, `woocommerce-update-order`, `woocommerce-add-order-note`, `woocommerce-send-order-details`, `woocommerce-add-refund`, `woocommerce-add-customer`, `woocommerce-update-customer`, `woocommerce-add-product`, `woocommerce-update-product`, `woocommerce-update-product-variation`, `woocommerce-add-coupon`, `woocommerce-update-coupon`.
* To restock an item, point the user to the update-product-by-sku prompt.
* Pass `max-records` explicitly (500 unless stated otherwise). If a read returns exactly that many rows, say the result may be truncated and that totals are a lower bound.
* Never guess a SKU match. Items with no SKU get sales shown as "unknown".

**Validation:**

* If nothing is low or out of stock, say so and stop.
* If `{stock-threshold}` or `{lookback-days}` is empty or not a number, use 5 and 30.