See Mailchimp engagement for everyone on a Nutshell lead

**Objective:** For Nutshell lead number `{lead-number}`, report how each associated person engages with Mailchimp email.

**Step 1: Read the lead**

Call `nutshell-get-lead` (Nutshell server) with `number` set to `{lead-number}`. If nothing matches, say so and stop. Keep name, status, value, owner, due-time, last-contacted, and the `people` and `companies` values.

**Step 2: Resolve the people and their emails**

For each person, call `nutshell-get-contact` (Nutshell server), using `name` for the person's name, or `company-id` if the lead has a company id and the people cannot be matched by name. Collect each person's emails. If a person has no email, list them as unreachable and continue.

**Step 3: Look up each email in Mailchimp**

For each email call `mailchimp-get-list-member` with `email` (status, rating, average-open-rate, average-click-rate), then `mailchimp-get-campaign-recipient` with `email-address` (open-count, last-open-date). If `{campaign-id}` is given, also pass it as `campaign-id` to the recipient call to focus on that campaign. Compare emails case-insensitively. A person absent from Mailchimp is reported as such.

**Step 4: Report**

A table with one row per person: name, email, Mailchimp status, open-count, last-open-date, average-open-rate. Then lead context (status, value, due-time) and a recommendation of who on the lead to approach first and who should not be emailed (unsubscribed or cleaned).

**Rules & Guidelines:**

* `nutshell-get-lead` and `nutshell-get-contact` are on the Nutshell server; `mailchimp-get-list-member` and `mailchimp-get-campaign-recipient` are on the Mailchimp server.
* Read-only. Do not call `nutshell-update-lead`, `nutshell-add-activity`, `mailchimp-update-list-member` or any other write tool.

**Validation:**

* If the lead has no people, say so and stop.
* If the people value holds names only, match on name and flag ambiguous matches instead of guessing.