Check overdue clients before you send a campaign

**Objective:** List the clients of `{company}` with overdue invoices and show, for each, whether Constant Contact can email them and whether they have engaged with recent campaigns. Look only at overdue invoices with at least `{min-outstanding}` outstanding (default 0).

**Step 1: Find overdue invoices (FreshBooks)**

Call `freshbooks-get-invoice` with `company` set to `{company}`, `status-name` or `payment-status` set to the overdue or unpaid value the tool returns, and `outstanding.min` set to `{min-outstanding}`. Group the invoices by `customer-id` and total `outstanding` per client. If the status values are unclear, call it once without a status filter and read the values that appear.

**Step 2: Get each client email (FreshBooks)**

Call `freshbooks-get-client` with `id` set to the `customer-id`. Keep `email`, `first-name`, `last-name` and `organization`. If the client has no email, report them as not reachable by email and skip step 3.

**Step 3: Check Constant Contact**

Call `constant-contact-get-contact` with `email-address` set to the client email. Take `contact-id` and `permission-to-send`. If nothing comes back, report the client as not in Constant Contact. Then call `constant-contact-get-contact-activity` with `contact-id` and note the most recent activity type and date.

**Step 4: Report**

One table sorted by total outstanding, largest first: client, invoices overdue, total outstanding, email, permission to send, last Constant Contact activity. Add a note on any client who is unsubscribed (do not send marketing to them) and any who are active in campaigns but owe money.

**Rules & Guidelines:**

* FreshBooks tools (server `freshbooks`): `freshbooks-get-client`, `freshbooks-get-invoice`, `freshbooks-get-payment`. Constant Contact tools (server `constant-contact`): `constant-contact-get-contact`, `constant-contact-get-contact-list-member`, `constant-contact-get-contact-list`, `constant-contact-get-contact-activity`.
* This prompt is read-only. Never call any add, update, delete, send or mark tool on either server, including `freshbooks-add-client`, `freshbooks-update-client`, `freshbooks-send-invoice-by-email`, `constant-contact-add-contact` and `constant-contact-update-contact`.
* Match clients to contacts on email address, compared case-insensitively after trimming spaces. Never match on name alone.
* Query only the FreshBooks company named in `{company}`; if it is empty and the account has more than one, ask which one before calling anything.

**Validation:**

* If there are no overdue invoices, say so and stop.
* If a client email maps to more than one contact, list them and do not pick one.