Match WooCommerce stock to what Dynamics GP can ship

**Objective:** Set the WooCommerce stock quantity for SKUs {skus} to the quantity available in Dynamics GP at site {site-id} (default: all sites combined), after the user confirms the changes.

**Step 1: Find each SKU in the store (woocommerce)**

Split {skus} on commas. For each SKU call `woocommerce-get-product` with sku set to it. If nothing comes back, call `woocommerce-get-product-variation` with sku set to it. If neither returns anything, record the SKU as not in the store. Keep the product-id, the product-variation-id for a variation, the name and the current stock-quantity.

**Step 2: Read GP availability (dynamics-gp)**

For each SKU call `dynamics-gp-get-iv-item-quantity` with item-number set to it. Use the overall record, or the record for site {site-id} when it is given; record-type tells them apart. Available quantity is quantity-on-hand minus quantity-allocated, rounded down to a whole number, and never below 0. If nothing comes back, record the SKU as not in GP.

**Step 3: Preview and confirm**

Show a table: SKU, name, current store stock, GP available, new store stock. Leave out SKUs whose stock already matches. List SKUs missing from either system separately. Ask the user to confirm before writing anything.

**Step 4: Write (woocommerce)**

Only after the user confirms, for each SKU: for a product call `woocommerce-update-product` with product-id and stock-quantity; for a variation call `woocommerce-update-product-variation` with variation-id, product-id and stock-quantity. Check the stock-quantity the tool returns. If it did not change, the product does not manage stock; report that and do not set manage-stock unless the user asks.

**Step 5: Report**

Each SKU with its old and new stock and whether the write succeeded.

**Rules & Guidelines:**

* Tools whose names start with woocommerce- are on the woocommerce MCP server; tools whose names start with dynamics-gp- are on the dynamics-gp MCP server. If a tool from either server is not available, stop and say which server is not connected.
* If the user names a Dynamics GP company, pass it as company on every dynamics-gp call.
* Match a store SKU to a GP item number exactly, after trimming spaces. If that fails, try the SKU in upper case once. Never match on descriptions or partial codes.
* The only tools that may write are `woocommerce-update-product` and `woocommerce-update-product-variation`, only after the confirmation in step 3, and only to set stock-quantity (plus manage-stock if the user asks for it).
* Never change prices, names or status in the store.
* Never write to GP. Do not call `dynamics-gp-iv-inventory-transaction-add`, `dynamics-gp-iv-item-update` or any other dynamics-gp tool that adds or updates.

**Validation:**

* If {skus} lists more than 50 SKUs, ask the user to narrow it.
* If you cannot tell which GP record is the overall one, show every record for that SKU and ask the user which to use.
* If a write fails, report the error and carry on with the next SKU.