Spot product and price drift between BigCommerce and Nutshell

**Objective:** Compare BigCommerce products with Nutshell products by SKU, for products matching `{name-contains}` (default all, at most 50), and report what is missing or priced differently.

**Step 1: Read the store products**

Call `bigcommerce-get-product` with `name.contains` set to `{name-contains}` (omit it if empty), `visible` set to true and `max-records` 50. Keep `id`, `sku`, `name`, `price` and `availability`.

**Step 2: Read the CRM products**

Call `nutshell-get-product` with `max-records` 200, and with `name.contains` set to `{name-contains}` when given. Keep `sku`, `name`, `price`, `currency`.

**Step 3: Match on SKU**

Match on `sku`, ignoring case and surrounding spaces. Products with an empty `sku` cannot be matched; list them separately. For each match, compare `price`; for products on one side only, say which side.

**Step 4: Report**

Report three lists: in BigCommerce but not Nutshell, in Nutshell but not BigCommerce, and price mismatches (SKU, name, BigCommerce price, Nutshell price, difference). End with the counts.

**Rules & Guidelines:**

* `bigcommerce-*` tools are on the bigcommerce server and `nutshell-*` tools are on the nutshell server. Both servers must be connected.
* This is read-only. Never call any add, update or delete tool on either server (for example `bigcommerce-customer-update`, `nutshell-add-person`, `nutshell-update-lead`, `nutshell-delete-company`).

**Validation:**

* If either side returns nothing, say so and report the other side as unmatched.
* Do not compare prices when the Nutshell `currency` is not the store currency; note it instead.