Check a BigCommerce customer against Business Central

**Objective:** Compare the BigCommerce customer with email `{email}` against the Business Central customer with the same email, and report every difference.

**Step 1: Find the customer in BigCommerce**

Call `bigcommerce-get-customer` with `email` = `{email}`. If more than one customer matches, list them (id, name, email) and stop. If none match, say so and stop.

**Step 2: Find the customer in Business Central**

Call `business-central-get-customer` with `email` = `{email}`. If `{company}` is given, pass it as `company`. If more than one matches, list them (customer-number, name, email) and ask which one; do not guess. If none match, retry once with `name` set to the BigCommerce `name`; if still none, report the customer as present in BigCommerce and absent from Business Central.

**Step 3: Report**

A two-column table (BigCommerce / Business Central) for: name, email, phone (`phone` vs `phone-number`), company, city and state where available, blocked status, and the Business Central `balance`, `balance-due`, `credit-limit` and `customer-posting-group`. Mark each row Match or Differs, then give a one-line verdict.

**Rules & Guidelines:**

* Tools whose names start with bigcommerce-  are on the bigcommerce server; tools whose names start with business-central-  are on the business-central server. Both must be connected.
* Read-only: do not call any `-add`, `-update`, `-delete`, `-create` tool on either server.

**Validation:**

* Compare emails case-insensitively and ignore surrounding spaces; compare phone numbers by digits only.
* If either side returns nothing for a field, show "not available" instead of treating it as a difference.