Compare what clients pay with how they engage in Drip

**Objective:** For the period `{date-from}` to `{date-to}` (default: the last 12 months), rank the top `{top-n}` paying FreshBooks clients (default 10) and compare their revenue with their Drip engagement.

**Step 1: Read payments from FreshBooks**

Call `freshbooks-get-payment` (FreshBooks server) with `date.from` and `date.to` set to the period and a high `max-records`. Total `amount` by `client-id` and take the top `{top-n}`.

**Step 2: Resolve clients to emails**

For each of those `client-id` values, call `freshbooks-get-client` with it as `id` and keep the `email`, name and organization.

**Step 3: Read engagement from Drip**

For each email, call `drip-get-subscriber` (Drip server) with `email` set to it. Keep `status`, `lead-score`, `lifetime-value` and `tags`.

**Step 4: Report**

Table ordered by FreshBooks revenue: client, revenue in the period, Drip status, lead score, Drip lifetime value, tags. Then list the mismatches worth a look: high-revenue clients who are not in Drip, are unsubscribed, or have a low lead score, and any client where Drip lifetime value is far from FreshBooks revenue.

**Rules & Guidelines:**

* `freshbooks-get-payment` and `freshbooks-get-client` are FreshBooks tools. `drip-get-subscriber` is a Drip tool.
* Read-only. Do not call any add, update or delete tool on either server, including `drip-add-subscriber-tag` and `freshbooks-add-payment`.
* Both servers take a `company` parameter; pass the company the user is authorized for on every call, and never mix companies.

**Validation:**

* Payments in different currencies must not be added together. Group by `currency-code` and report each separately.
* If a client has no email or no Drip subscriber, show the row with blanks for the Drip columns.
* If no payments are returned for the period, say so and stop.