Reconcile a GP customer balance with Stripe in one request

**Objective:** For customer `{customer-name}` (optionally GP company `{company}`), reconcile the amount GP says is owed against Stripe invoices and charges, looking back `{lookback-days}` days (default 90).

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

Call `powergp-online-get-customers` with `customer-name.contains` set to the name. If more than one customer matches, list `customer-number` and `customer-name` for each and stop. Keep `customer-number`, `customer-name` and `balance-due`.

**Step 2: Open items in GP**

Call `powergp-online-get-receivablestransactions` with that `customer-number`. Total `unapplied-amount` and `document-amount` by `document-type`, and note any with `days-past-due` above 0.

**Step 3: Find the customer in Stripe**

GP has no email on the customer, so match by name. Call `stripe-get-customer` with `name.contains` set to the GP `customer-name`. If several match, list `customer-id`, `name` and `email` and stop. If none match, report the customer as present in GP and absent from Stripe, and skip to Step 6.

**Step 4: Stripe invoices**

Call `stripe-get-invoice` with that `customer-id` and `created-date.from` set to the lookback start. Total `total`, `amount-paid` and `amount-remaining` by `status`.

**Step 5: Stripe charges**

Call `stripe-get-charge` with the same `customer-id`. Total `amount` and `amount-refunded` for succeeded charges.

**Step 6: Report**

A table with GP balance-due, GP open receivables, Stripe amount-remaining and Stripe amount paid, then the difference between GP and Stripe and likely causes (payments not yet applied in GP, invoices not in GP, refunds).

**Rules & Guidelines:**

* Tools prefixed powergp-online- belong to the powergp-online-ai server (Dynamics GP). Tools prefixed stripe- belong to the stripe server. Both servers must be connected.
* Read-only. Call only get tools. Never create, change or delete anything on either side.
* Pass `company` on every GP call when the user names one; otherwise state which company the GP data came from.
* Stripe amounts and GP amounts may use different currencies; compare only like currencies and flag the rest.

**Validation:**

* If either side returns nothing, say which and report only the other side.
* If currencies differ between the systems, do not net the figures; show them separately.