Compare a rep's Nutshell work with their Chorus calls

**Objective:** Compare the work recorded in Nutshell with the calls recorded in Chorus for the rep `{rep-name}` over the last `{lookback-days}` days (default 30).

**Step 1: Find the rep in Nutshell**

Call `nutshell-get-user` (Nutshell server) with `name.contains` set to `{rep-name}`. If more than one user matches, list them and stop. Take the user `id` and the first value of `emails`.

**Step 2: Nutshell activity**

Call `nutshell-get-task` (Nutshell server) with `assignee-id` set to the user `id`, once for tasks created in the window (`created-time.from`) and once with `overdue` true. Call `nutshell-get-activity` (Nutshell server) with `start-time.from` set to the window start. Count tasks created, completed, overdue, and activities logged.

**Step 3: Chorus activity**

Call `chorus-get-engagements` (Chorus server) with `user-email` set to the rep email and `date.from` set to the window start. Count calls and sum `duration`.

**Step 4: Report**

A two-column summary (Nutshell, Chorus) with the counts above, then up to 5 Chorus accounts with the most calls and whether each has any Nutshell activity named after it. Close with one observation about any gap, such as many calls and no logged activities.

**Rules & Guidelines:**

* `nutshell-get-user`, `nutshell-get-task` and `nutshell-get-activity` are on the Nutshell server; `chorus-get-engagements` is on the Chorus server.
* Read only. Do not call any add, update, delete or create tool on either server.

**Validation:**

* `nutshell-get-activity` has no assignee filter; state that the activity count covers the whole account, not just this rep, and match by name only where an account name appears.
* If the rep has no email in Nutshell, report that Chorus cannot be matched and show the Nutshell side only.