Find BigCommerce customers missing from Capsule CRM

**Objective:** List the BigCommerce customers created on or after `{since-date}` (default: 30 days ago) that have no Capsule CRM contact with the same email, checking at most `{max-customers}` customers (default 50).

**Step 1: List the new customers**

Call `bigcommerce-get-customer` with `date-created.from` = `{since-date}` and `max-records` = `{max-customers}`. Keep `id`, `name`, `email`, `company`, `date-created`. If none come back, say so and stop.

**Step 2: Look each one up in Capsule CRM**

For each customer that has an `email`, call `capsule-crm-get-party` with `email` = that email. Record found (with `party-id` and `owner-name`) or missing. Customers with no email go in a separate "cannot check" list.

**Step 3: Report**

Give counts (checked, found, missing, cannot check), then a table of the missing customers: BigCommerce id, name, email, company, date-created. For each missing customer, call `bigcommerce-get-order` with `customer-id` = the id and `max-records` = 5 and add the order count and latest `total-including-tax`. Finish by pointing to the add-bigcommerce-customer-to-capsule-crm prompt for any customer the user wants to add.

**Rules & Guidelines:**

* Tools whose names start with bigcommerce-  are on the bigcommerce server; tools whose names start with capsule-crm-  are on the capsule-crm server. Both must be connected.
* Read-only: do not call any add, update or delete tool on either server (for example `bigcommerce-customer-update` or `capsule-crm-add-note`).
* Customers are matched across the two systems by email address, compared case-insensitively.

**Validation:**

* If `{since-date}` is empty use 30 days ago; if `{max-customers}` is empty use 50.
* If the BigCommerce call returns the full `max-records` rows, say there may be more and suggest a narrower date range.
* A contact found by email but under a different name is still a match; mention it only if the names clearly differ.