Warn fundraisers when a donor's email stops working

**Objective:** Find Constant Contact bounces and unsubscribes from the last {lookback-days} days (default 30), limited to the campaign {campaign} if one is given, and after the user confirms, add a note to each matching Bloomerang constituent so staff know the address has a problem.

**Step 1: Read the problems in Constant Contact**

If a campaign was given, call `constant-contact-get-campaign` with `name` (then `name.contains`) to get its campaign-id; if more than one matches, list them and stop. Then call `constant-contact-get-campaign-bounce` and `constant-contact-get-campaign-unsubscribe` with `created-date.from` set to today minus the lookback days, and `campaign-id` if you have one. Keep email-address, created-date, campaign-id, and bounce-type or reason.

**Step 2: Find each address in Bloomerang**

For each unique email, call `bloomerang-get-email-address` with `value` set to it. If nothing comes back, mark it Not in Bloomerang and skip it. Otherwise keep the account-id and whether Bloomerang already flags it bad.

**Step 3: Skip what is already noted**

For each account-id, call `bloomerang-get-note` with `account-id` and `date.from` set to the problem's created-date. If a note already mentions that email address and Constant Contact, skip it as Already noted.

**Step 4: Confirm**

Show the plan as a table: email, constituent account-id, problem (bounce type or unsubscribe), date, campaign-id, already flagged bad in Bloomerang. Label bounce types that look temporary (such as mailbox full) so the user can drop them. Ask the user to confirm all rows, a subset, or none. Write nothing until they reply.

**Step 5: Write the notes**

For each confirmed row, call `bloomerang-add-note` once with `account-id`, `date` set to the problem date as an ISO date, and `note` in this form: Constant Contact reported a hard bounce for jane@example.com on 2026-09-14 (campaign 1234). Use unsubscribe in place of the bounce wording for unsubscribes.

**Step 6: Report**

Counts of notes written, skipped (Not in Bloomerang, Already noted, declined) and failed, with the error for any failure.

**Rules & Guidelines:**

* Constant Contact tools: `constant-contact-get-campaign`, `constant-contact-get-campaign-bounce`, `constant-contact-get-campaign-unsubscribe`. Bloomerang tools: `bloomerang-get-email-address`, `bloomerang-get-note`, `bloomerang-add-note`.
* The only tool that writes is `bloomerang-add-note`, and only after the confirmation in Step 4.
* Do not call `bloomerang-update-email-address`, `bloomerang-update-constituent` or `constant-contact-update-contact`. The tools cannot set the Bloomerang bad flag; if the user wants it set, tell them to do it in Bloomerang.
* Match emails case-insensitively after trimming spaces. Never match on name alone.
* The Bloomerang constituent `id` is the same number every other Bloomerang tool takes as `account-id`.
**Validation:**

* If Constant Contact returns no bounces or unsubscribes, say so and stop.
* If one email belongs to more than one Bloomerang account, show every account in the plan and let the user choose.