Find WooCommerce customers missing from FreshBooks

**Objective:** Compare WooCommerce customers with FreshBooks clients for the FreshBooks company `{company}`, created since `{since-date}` (default: all), and report who exists in only one system.

**Step 1: Read WooCommerce**

Call `woocommerce-get-customer` with `created-date.from` set to `{since-date}` when given. Keep `customer-id`, `email`, `first-name`, `last-name`, `billing-company`.

**Step 2: Read FreshBooks**

Call `freshbooks-get-client` with `signup-date.from` set to `{since-date}` when given. Keep `id`, `email`, `first-name`, `last-name`, `organization`. For any WooCommerce email not found, call `freshbooks-get-client` again with the `email` filter before calling it missing.

**Step 3: Join and report**

Match on email. Report counts first, then three lists: in WooCommerce only, in FreshBooks only, in both with differences (names, billing-company versus organization). Customers with no email go in a separate "cannot match" list.

**Rules & Guidelines:**

* FreshBooks tools (named freshbooks-...) are on the freshbooks server; WooCommerce tools (named woocommerce-...) are on the woocommerce server. Both servers must be connected.
* Pass `{company}` as the company parameter on every FreshBooks call when it is given; if FreshBooks reports more than one company and none was given, ask which one and stop.
* Match on email, case-insensitive and trimmed. Never match on name alone.
* This prompt is read-only. Never call any FreshBooks add, update, delete, mark or send tool (for example `freshbooks-add-invoice`, `freshbooks-add-payment`, `freshbooks-add-credit-note`, `freshbooks-send-invoice-by-email`) or any WooCommerce add, update or send tool (for example `woocommerce-add-order-note`, `woocommerce-update-order`, `woocommerce-send-order-details`).

**Validation:**

* If either side returns nothing, say so and still report the other side as unmatched.
* If two records on one side share an email, list them as duplicates and do not pick one.