Pair Rillet overdue balances with Stripe payment health

**Objective:** For customers with overdue invoices in Rillet (only those whose name contains {customer-name}, if given, and owing at least {min-amount-due}, default 0), show what Stripe knows about their ability to pay, and suggest a next action for each.

**Step 1: Find the overdue balances in Rillet**

Call `rillet-get-invoices` (no filters). Keep invoices where overdue is true, or where due-date is before today and amount-due is above zero. Call `rillet-get-customers` to name each customer-id, apply {customer-name} in memory, and total amount-due per customer. Drop customers owing less than {min-amount-due}.

**Step 2: Find each customer in Stripe**

Call `rillet-get-customer-emails` for the customer's emails, then `stripe-get-customer` with `email` = each email until one matches. If none match, try `stripe-get-customer` with `name` = the Rillet name. If still nothing, mark the customer Not in Stripe and move on.

**Step 3: Read their Stripe payment health**

For each matched Stripe customer-id:

* `stripe-get-customer`: delinquent and balance.
* `stripe-get-charge` with `customer-id` and `status` = failed, created in the last 90 days: the most recent failure-message and the count.
* `stripe-get-payment-method` with `customer-id`: whether any card has expired or expires within 30 days.
* `stripe-get-subscription` with `customer-id`: any subscription with status past_due or unpaid.

**Step 4: Report**

One row per customer, largest amount owed first: customer, Rillet overdue total, currency, oldest overdue due date, Stripe delinquent, failed charges in 90 days with the last failure reason, card status, past-due subscriptions, and a suggested next action (ask for a new card, retry the payment, or contact the customer). List Not in Stripe customers at the end.

**Rules & Guidelines:**

* `rillet-get-invoices`, `rillet-get-customers` and `rillet-get-customer-emails` are on the rillet server. The tools starting stripe- are on the stripe server.
* This prompt is read-only. Do not call `rillet-add-invoice-payment`, `rillet-setup-customer-auto-payment`, `rillet-update-customer` or `rillet-set-invoice-sent-status`.

**Validation:**

* If no invoices are overdue, say so and stop.
* Stripe amounts may be in the smallest currency unit; report Stripe balances divided by 100 when they are clearly in cents, and say so.
* If a tool cannot be found, name the server it belongs to (rillet or stripe) and stop.