Know which Drip email series to fix, restart or retire

**Objective:** Review the health of the Drip email series campaigns, optionally limited to names containing `{name-contains}`, and recommend which to fix, restart or retire.

**Step 1: Pull campaigns**

Call `drip-get-campaign` with `max-records` = 200, and `name.contains` = `{name-contains}` only if given.

**Step 2: Classify each campaign**

* **Running:** status active with active subscribers
* **Empty but running:** status active with 0 active subscribers (sending to no one)
* **Paused with audience:** status paused with active subscribers (people stuck mid-series)
* **Stale draft:** status draft and created more than 90 days ago
* **High churn:** unsubscribed count above 20 percent of active subscribers

Also note campaigns with double opt-in disabled and campaigns whose from email differs from the majority.

**Step 3: Sample the audience of problem campaigns**

For every campaign in **Paused with audience**, call `drip-get-campaign-subscriber` with `campaign-id` set to its campaign-id and `max-records` = 10 to show who is stuck.

**Step 4: Report**

A table of all campaigns: name, campaign-id, status, active subscribers, unsubscribed, emails, created date, classification. Then a **Recommendations** list, one line per problem campaign.

**Rules & Guidelines:**

* Read-only. Do NOT call `drip-activate-campaign`, `drip-pause-campaign`, `drip-remove-subscriber-from-campaign` or `drip-remove-subscriber-from-all-campaigns`. To act on a recommendation, the user runs `change-automation-status`.

**Validation:**

* If no campaigns are returned, say so and stop.