Check if a DonorPerfect donor actually receives your emails

**Objective:** Build a combined profile for the donor with email `{donor-email}`: their DonorPerfect record and giving, and their Mailchimp audience membership and email engagement over the last `{lookback-days}` days (default 90).

**Step 1: Find the donor in DonorPerfect**

Call `donorperfect-get-donor` with `email` set to `{donor-email}`. If nothing comes back, call `donorperfect-get-address` with `email` set to `{donor-email}` and use its `donor-id` to call `donorperfect-get-donor` again with `donor-id`. If more than one donor matches, list them (donor id, name, city) and stop. If no donor matches, say the email is not on file in DonorPerfect and continue with Step 3 only.

**Step 2: Read their giving**

Call `donorperfect-get-gift` with the donor's `donor-id`. Note gift total, gift count, the last gift date and amount, and any open pledge balance.

**Step 3: Find them in Mailchimp**

Call `mailchimp-get-list-member` with `email` set to `{donor-email}`. Record each audience they belong to, with status, tags, rating and average open and click rates. If nothing comes back, report the donor as not in any Mailchimp audience.

**Step 4: Recent email engagement**

Call `mailchimp-get-campaign-email-activity` with `email-address` set to `{donor-email}` and `activity-date.from` set to `{lookback-days}` days before today. Call `mailchimp-get-campaign-unsubscribe` with `email` set to `{donor-email}`. Summarize opens, clicks and bounces by campaign, and any unsubscribe with its date and reason.

**Step 5: Report**

A short profile with three sections: DonorPerfect (name, donor id, gift total, last gift), Mailchimp (audiences and status, engagement rates, recent activity), and Observations (for example: an active donor who has unsubscribed, a hard bounce on the email DonorPerfect holds, or a highly engaged subscriber who has never given).

**Rules & Guidelines:**

* `donorperfect-get-donor`, `donorperfect-get-address` and `donorperfect-get-gift` are on the donorperfect server. `mailchimp-get-list-member`, `mailchimp-get-campaign-email-activity` and `mailchimp-get-campaign-unsubscribe` are on the mailchimp server.
* This is read-only. Do NOT call `donorperfect-save-donor`, `donorperfect-save-contact`, `donorperfect-set-flag`, `mailchimp-add-list-member` or `mailchimp-update-list-member`.
* Match emails case-insensitively after trimming spaces.

**Validation:**

* If neither system has the email, say so and stop.
* If the donor's DonorPerfect email differs from `{donor-email}` only by case, treat it as the same person and mention it.