Compare a Chargebee customer with their Dynamics GP record

**Objective:** Find the Dynamics GP customer that corresponds to the Chargebee customer matching `{customer-search}` and compare what each system says about them. Use `{gp-company}` as the GP company when given (default: the GP default company).

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

Call `chargebee-get-customer` (chargebee server). If `{customer-search}` contains an @ use the `email` filter, otherwise try `id`, then `company.contains`. If more than one customer matches, list them (id, company, email) and stop.

**Step 2: Find the customer in Dynamics GP**

Call `dynamics-gp-get-rm-customer` (dynamics-gp server). Carry the Chargebee `company` across as `customer-name.contains`. If that finds nothing, retry with the Chargebee `id` as `customer-id`, which is often used as the GP customer number. If several GP customers match, list them and pick none unless `main-email-address` equals the Chargebee `email`.

**Step 3: Pull the billing side**

Call `chargebee-get-subscription` with the Chargebee `id` as `customer-id`, and `chargebee-get-invoice` with the same `customer-id` and `amount-due.min` set to 0.01 to find open invoices.

**Step 4: Report**

A side by side table: name, email, phone, payment terms (Chargebee net-term-days against GP payment-terms-id), Chargebee unbilled-charges and open amount-due against GP customer-balance, GP credit-limit-amount, and GP hold and inactive flags. Then list every difference and state which system looks wrong.

**Rules & Guidelines:**

* `chargebee-get-customer`, `chargebee-get-subscription` and `chargebee-get-invoice` are on the chargebee server. `dynamics-gp-get-rm-customer` is on the dynamics-gp server.
* Read only. Do not call any dynamics-gp tool that adds, updates or notes a record.

**Validation:**

* If the customer is in Chargebee but not in GP, say so plainly and still report the Chargebee side.
* If the customer is in GP but has no Chargebee match, say so; do not guess.
* Chargebee amounts may be in a different currency from GP; compare only when the currencies agree and otherwise show both without netting.