Close HubSpot collection tasks once Stripe shows payment

**Objective:** Find open HubSpot tasks whose title contains `{title-text}` (default "Collect Stripe invoice", at most `{max-records}` tasks, default 50) and, after the user confirms, mark completed the ones whose Stripe invoice is now paid.

**Step 1: Read open collection tasks from HubSpot**

Call `hubspot-get-tasks` with `task-title.contains` set to `{title-text}` ("Collect Stripe invoice" if empty) and `max-records` set to `{max-records}` (50 if empty). Keep tasks whose `task-status` is not completed, with `record-id`, `task-title`, `contact-email` and `due-date`. Take the invoice number from the end of `task-title`. Tasks with no number in the title are listed as unreadable and left alone.

**Step 2: Read each invoice in Stripe**

The join is the invoice number in the task title against the Stripe invoice `number`. Call `stripe-get-invoice` with `number` set to it and keep `status`, `amount-paid`, `amount-remaining`, `currency` and `customer-email`. If nothing comes back, list the task as unmatched and leave it open.

Classify each task:

* Paid: `status` is paid, or `amount-remaining` is zero. The task is done.
* Closed without payment: `status` is void or uncollectible. Leave the task open for the user to decide.
* Still open: show amount remaining and how many days past `due-date` the task is.

Note any task whose `contact-email` differs from the invoice `customer-email`, so the user can check it is the right invoice.

**Step 3: Confirm**

Show the three groups with invoice number, customer, status and amounts (minor units divided by 100). Ask for an explicit yes to complete the Paid group and offer to exclude rows. Do not continue without a yes.

**Step 4: Write and verify**

For each confirmed task, call `hubspot-update-task` once with `id` set to the task `record-id` and `status` set to COMPLETED, changing no other field. Then call `hubspot-get-tasks` with `task-title.contains` set to each invoice number and confirm the status. Report completed, failed and skipped tasks.

**Rules & Guidelines:**

* `stripe-get-invoice` is on the stripe server; `hubspot-get-tasks` and `hubspot-update-task` are on the hubspot server.
* The only write tool allowed is `hubspot-update-task`, once per confirmed task, only to set `status` to COMPLETED, and only after the confirmation in Step 3. Call no other hubspot-add, hubspot-update, hubspot-rename, hubspot-remove, hubspot-subscribe, hubspot-unsubscribe or hubspot-import tool.
* The stripe server has no write tools; only the stripe read tools named here are used, and nothing is charged, refunded or sent to the customer.

**Validation:**

* If no open task matches, say so and stop.
* If the user declines or does not answer, stop with nothing written.
* If an invoice number matches more than one Stripe invoice, list them and leave the task open.