Get the whole Rillet account picture for one customer

**Objective:** Give a complete account review of the customer `{customer-name}`: what they are contracted for, what they are worth in recurring revenue, what they have been billed, what they have paid, and what they still owe.

**Step 1: Resolve the customer**

Call `rillet-get-customers` (it takes no filters) and find the customer whose `name` or `invoicing-name` matches `{customer-name}`. If more than one matches, list them with city, country and `customer-id`, and stop. If none match, say so and stop.

**Step 2: Contracts**

Call `rillet-get-contracts` filtered by `customer-id`, then `rillet-get-contract-items` filtered by `customer-id`. Call `rillet-get-products` to name each `product-id`.

**Step 3: Recurring revenue trend**

Call `rillet-get-arr-waterfall` filtered by `customer-id`. Take the last twelve `year-month` values.

**Step 4: Billing and cash**

* Call `rillet-get-invoices` (no filters) and keep this `customer-id`.
* Call `rillet-get-invoice-payments` (no filters) and keep payments whose `invoice-id` is one of those invoices.
* Call `rillet-get-credit-memos` filtered by `customer-id`.

**Step 5: Report**

* Header: name, location, payment terms, whether invoices send automatically.
* Contracts: name, status, start and end date, total value, and the items under each (product, quantity, price, revenue pattern).
* ARR: current ARR, ARR twelve months ago, and the change, with the months listed.
* Billing: invoice count and total billed per currency, total paid, total credited, and the open balance (sum of `amount-due`).
* Flags: overdue invoices, a contract ending in the next 90 days, ARR that fell in the last three months, credit memos not tied to an invoice.

**Rules & Guidelines:**

* This is read-only. Do not call any tool whose name starts with rillet-add-, rillet-update-, rillet-apply-, rillet-unapply-, rillet-record-, rillet-set- or rillet-setup-. In particular do not call `rillet-update-customer`.
* Never add amounts in different currencies together.
* Report what the data says. Do not speculate on why a customer is paying late.

**Validation:**

* If a section returns nothing, say "none" for it and continue; a customer with no contracts is still worth reviewing.