Add an account's people to Constant Contact, opt-outs respected

**Objective:** Add the contacts at the Dynamics 365 Sales account `{account-name}` to the Constant Contact list `{list-name}`. Nothing is created until the user confirms.

**Step 1: Get the people from Dynamics 365 Sales**

Call `dynamics-365-sales-get-accounts` with `account-name` set to `{account-name}`, then `account-name.contains` if nothing comes back. If more than one account matches, list them and stop.

Call `dynamics-365-sales-get-contacts` with `parent-customer` set to the account-name. Keep contacts that have an email and whose status is not inactive.

**Step 2: Find the list in Constant Contact**

Call `constant-contact-get-contact-list` with `name` set to `{list-name}`, then `name.contains`. If none matches, say so and stop; do not create a list. If more than one matches, list them and stop. Note the `list-id`.

**Step 3: Sort each person**

For each email:

1. Call `constant-contact-get-campaign-unsubscribe` with `email-address`. If anything comes back, mark "unsubscribed, skip".
2. Call `constant-contact-get-contact` with `email-address`. If a contact exists, call `constant-contact-get-contact-list-member` with its `contact-id` and the `list-id`. Mark "already on the list" or "in Constant Contact but not on this list".
3. Otherwise mark "new, will be added".

**Step 4: Propose, then wait**

Show the four groups with name and email. Explain that no tool adds an existing Constant Contact contact to a list, so the "not on this list" group must be added by hand in Constant Contact. Ask the user to confirm adding the "new" group, and whether they have permission to email these people. Do not create anything until they answer.

**Step 5: Add the confirmed contacts**

For each confirmed person, call `constant-contact-add-contact` with `email`, `first-name`, `last-name`, `job-title`, `company-name` (the account name), `phone` (business-phone, else mobile-phone) and `list-id`. Set `permission-to-send` only if the user stated a consent basis in Step 4; otherwise leave it unset.

**Step 6: Confirm**

Call `constant-contact-get-contact-list-member` with `list-id` and each added email. Report added, skipped (with reason), needs manual list add, and failed, with counts.

**Rules & Guidelines:**

* dynamics-365-sales tools are on the dynamics-365-sales server; constant-contact tools are on the constant-contact server.
* The only write allowed is `constant-contact-add-contact`, once per confirmed person, after Step 4. Do NOT call `constant-contact-update-contact`, `constant-contact-add-contact-list`, `constant-contact-update-contact-list`, `constant-contact-add-campaign`, or any dynamics-365-sales create or update tool.
* Never add someone who has unsubscribed.

**Validation:**

* If the account has no contacts with an email, say so and stop.
* If a create fails, report it and continue; do not retry automatically.
* Match emails case-insensitively.