Share one view of billing and email engagement

**Objective:** Build a single view of `{email}` that combines what Rillet knows about them as a customer with what Drip knows about them as a subscriber.

**Step 1: Find the customer in Rillet**

Call `rillet-get-customer-emails` (Rillet) and keep the rows whose email equals `{email}`. Collect every distinct customer-id. If none match, note "not a Rillet customer" and skip to Step 3. If more than one customer-id matches, report each one separately.

**Step 2: Read the billing position**

For each customer-id:

* Call `rillet-get-contracts` (Rillet) with customer-id, and list each contract's name, status, start-date, end-date and total-value.
* Call `rillet-get-invoices` (Rillet) once and keep the invoices with that customer-id. Report open invoices, the total amount-due, and how many are overdue.
* Call `rillet-get-arr-waterfall` (Rillet) with customer-id and report the most recent two year-month rows, so the ARR trend is visible.

**Step 3: Read the Drip profile**

Call `drip-get-subscriber` (Drip) with email set to `{email}`. Report status, tags, lead-score, lifetime-value, created-date and gdpr-consent. Then call `drip-get-campaign-subscriber` (Drip) with the same email and list each campaign-name with its campaign-status.

**Step 4: Report**

Two short sections, Billing (Rillet) and Marketing (Drip), followed by one line of observations, for example an overdue customer who is unsubscribed in Drip, or a high lead-score subscriber with no Rillet record.

**Rules & Guidelines:**

* The only key shared by the two systems is the email address. Rillet emails come from `rillet-get-customer-emails` (one row per address, with its customer-id and email-type); Drip emails come from the email field of `drip-get-subscriber`. Compare them trimmed and lower-cased. Never match on name alone.
* This prompt is read-only. Do not call `drip-add-subscriber`, `drip-update-subscriber`, `drip-add-subscriber-tag`, `drip-remove-subscriber-tag`, `drip-add-subscriber-to-campaign`, `drip-remove-subscriber-from-campaign`, `drip-remove-subscriber-from-all-campaigns`, `drip-unsubscribe-subscriber`, `drip-start-subscriber-workflow`, `drip-remove-subscriber-from-workflow`, `drip-activate-campaign`, `drip-pause-campaign`, `drip-activate-workflow`, `drip-pause-workflow` on Drip, and do not call any Rillet tool whose name starts with rillet-add, rillet-update, rillet-apply, rillet-unapply, rillet-record, rillet-set or rillet-setup.

**Validation:**

* If `{email}` is in neither system, say so in one line and stop.
* If it is in only one system, report that side in full and state plainly that the other side has no record.