See how much of your Chorus email record is hidden or deleted

**Objective:** Audit the Chorus email record over the last `{lookback-days}` days (default 90): what has been deleted, by whom, and how much of the captured email is marked private and therefore invisible to the wider team.

**Step 1: Read the deletions**

Call `chorus-get-email-threads` with `deleted` set to true and `deleted-at.from` set to the start of the window. Keep `email-thread-id`, `deleted-by-name`, `deleted-at`, `private` and `user-id`. If `{deleted-by}` was supplied, narrow with `deleted-by-name.contains`.

**Step 2: Read the private threads**

Call `chorus-get-email-threads` with `private` set to true. Count them, and count all threads with no filter beyond `max-records` so you have a denominator.

**Step 3: Attribute**

For each distinct `deleted-by-name`, and for the owners of the private threads, call `chorus-get-users` with `name.contains` set to that name to get `email`, `role` and `title`. A deletion by an administrator reads differently from a deletion by a rep, and the report should let the reader tell them apart.

**Step 4: Cross check against the emails**

Call `chorus-get-emails` with `sent-time.from` set to the start of the window and note how many are marked `private` and which accounts they relate to, using `account-name`. This shows whether privacy clusters on particular accounts.

**Step 5: Report**

Produce:

* **Deletion summary** - how many threads deleted in the window, and the trend across the period.
* **Who deleted** - a table of person, role, count, and the date range of their deletions. Put anyone with an unusually concentrated burst first, and state the count rather than characterising it.
* **Private volume** - private threads as a share of all threads, and private emails as a share of all emails.
* **Where privacy clusters** - the accounts and owners with the most private email.
* **What to follow up** - the specific questions worth asking a person, each tied to a count.

**Rules & Guidelines:**

* This is read only. Do not call any tool that creates, updates or exports.
* Report counts and let the reader judge. Do not accuse anyone of concealment, and do not describe a deletion as suspicious.
* Do not quote the body of a private email into the report. Reference the thread by its id and its account only.

**Validation:**

* If nothing was deleted in the window, say so and report the private volume alone.
* If a `deleted-by-name` does not resolve to a current user, report the name as it stands and note that the account no longer exists.