Match Chargebee customers to Rillet and find the gaps

**Objective:** Find which Chargebee customers have no matching Rillet customer, looking at up to {max-customers} Chargebee customers (default 25), optionally narrowed to company names containing {company-filter}.

**Step 1: Read Chargebee customers (chargebee server)**

Call `chargebee-get-customer` with `max-records` set to {max-customers} (25 if empty). If {company-filter} is not empty, pass it as `company.contains`. Keep `id`, `email`, `first-name`, `last-name`, `company`, `net-term-days` and `preferred-currency` for each.

**Step 2: Read Rillet customers (rillet server)**

Call `rillet-get-customer-emails` (it returns `email`, `name` and `customer-id`) and `rillet-get-customers` (it returns `customer-id`, `name`, `invoicing-name`, `payment-terms`). Neither takes filters, so match in memory.

**Step 3: Match**

For each Chargebee customer, match on email (case-insensitive, trimmed) against `email` from `rillet-get-customer-emails`. If there is no email match, try an exact case-insensitive match of the Chargebee `company` (or first plus last name) against Rillet `name` or `invoicing-name`. Label each result: matched by email, matched by name only (weaker), or no match.

**Step 4: Report**

A table: Chargebee `id`, company or name, email, Rillet `customer-id` (or none), match basis. Then list the unmatched customers and any Rillet customer matched by more than one Chargebee customer.

**Rules & Guidelines:**

* `chargebee-get-customer` is on the chargebee server. `rillet-get-customer-emails` and `rillet-get-customers` are on the rillet server.
* This prompt is read-only. Do not call any Rillet write tool such as `rillet-add-customer` or `rillet-update-customer`.

**Validation:**

* If Chargebee returns no customers, say so and stop.
* If Rillet returns no customers, report every Chargebee customer as unmatched and stop.
* If a name matches but the email differs, flag it for review rather than treating it as a clean match.