Find gaps in the WooCommerce to Mailchimp store sync

**Objective:** Check that WooCommerce customers created in the last `{days-back}` days (default 30) have reached the Mailchimp store, with matching order counts and spend, and that Mailchimp has no store customers WooCommerce does not.

**Step 1: Find the WooCommerce store in Mailchimp**

Call `mailchimp-get-store` with `platform` set to WooCommerce. Note each store's `store-id`, `name`, `domain` and `is-syncing`. If none comes back, report that no WooCommerce store is connected to Mailchimp and stop. If more than one comes back, list them and stop unless the user names one.

**Step 2: Read recent WooCommerce customers**

Work out the start date as today minus `{days-back}` days. Call `woocommerce-get-customer` with `created-date.from` set to that date. For each customer, call `woocommerce-get-order` with `customer-email` and count the orders that are not cancelled, failed or refunded, and total their `total`.

**Step 3: Look each one up in Mailchimp**

For each WooCommerce customer, call `mailchimp-get-customer` with `email` set to the customer's `email`, and keep only rows whose `store-id` is the store from Step 1. Classify each customer:

* **Missing:** no Mailchimp row.
* **Out of sync:** `orders-count` differs, or `total-spent` differs from the WooCommerce total by more than 0.01.
* **In sync:** everything matches.

**Step 4: Check the reverse direction**

Call `mailchimp-get-customer` with `created-at-date.from` set to the same start date. For each row on the Step 1 store that was not matched in Step 3, call `woocommerce-get-customer` with `email`. Report any that WooCommerce does not know as **Mailchimp only**.

**Step 5: Report**

A one-line summary (customers checked, in sync, missing, out of sync, Mailchimp only), then a table per non-empty class with email, name, WooCommerce orders and spend, Mailchimp `orders-count` and `total-spent`. End with the store's `is-syncing` value and, if many customers are missing, say the Mailchimp for WooCommerce sync is the likely cause rather than individual records.

**Rules & Guidelines:**

* `woocommerce-get-customer` and `woocommerce-get-order` are on the woocommerce server. `mailchimp-get-store` and `mailchimp-get-customer` are on the mailchimp server.
* This prompt is read-only. Do not call `mailchimp-add-customer`, `mailchimp-update-customer`, `woocommerce-add-customer` or `woocommerce-update-customer`.

**Validation:**

* Match on email, compared case-insensitively. Guest orders without a WooCommerce customer record are out of scope.
* Mailchimp may lag the store by a few minutes; mention that customers created today may show as missing for that reason.
* If WooCommerce returns no customers in the window, say so and stop.