Bring Constant Contact details in line with Business Central

**Objective:** For members of the Constant Contact list `{list-name}`, compare company name, job title and phone with the matching Business Central contact, treating Business Central as correct, and update Constant Contact once the user confirms.

**Step 1: Read the list members in Constant Contact**

Call `constant-contact-get-contact-list-member` with `list-name` set to `{list-name}`. If nothing comes back, try `list-name.contains`, and if that matches several lists, show them and stop. Keep `contact-id` and `email-address`. For each member, call `constant-contact-get-contact` with `contact-id` for `company-name`, `job-title`, `phone-number`, `first-name` and `last-name`.

**Step 2: Find the Business Central contact**

For each member, call `business-central-get-contact` with `email` set to the member's `email-address`. If nothing comes back, report the member as not in Business Central and move on. If several come back, list them and leave that member unchanged.

**Step 3: Compare**

Compare `company-name`, `job-title` and phone (Business Central `phone-number`, or `mobile-phone-number` if that is empty) ignoring case, spaces and phone punctuation. Do not count a value that is empty in Business Central as a difference.

**Step 4: Confirm**

Show a table of differences: email, field, Constant Contact value, Business Central value. Ask the user to confirm all, some, or none. Do not proceed without a clear answer.

**Step 5: Update**

For each confirmed contact, call `constant-contact-update-contact` with `contact-id` and only the changed fields (`company-name`, `job-title`, `phone`). Stop and report on the first error.

**Step 6: Report**

Updated, unchanged, not in Business Central, and ambiguous, with counts.

**Rules & Guidelines:**

* `constant-contact-get-contact-list-member`, `constant-contact-get-contact` and `constant-contact-update-contact` are on the constant-contact server; `business-central-get-contact` is on the business-central server.
* The only write tool allowed is `constant-contact-update-contact`, on the constant-contact server, after confirmation. Never change the email address or `permission-to-send`.
* Do NOT call `business-central-update-contact` or any other Business Central create or update tool.
* Pass `company` to the Business Central tool only if the user names a company.

**Validation:**

* If no member differs, say so and stop.
* If the list has more than 200 members, process the first 200 and say how many remain.