Find Chorus calls that never got a TickTick follow-up

**Objective:** Find Chorus conversations for the account `{account-name}` in the last `{lookback-days}` days (default 14) that have no follow-up task in TickTick. Read only.

**Step 1: List the calls (Chorus server)**

Call `chorus-get-engagements` with `account-name.contains` set to the account and `date.from` set to today minus the lookback. Keep `conversation-id`, `subject`, `date`, `user-name`. If nothing comes back, say so and stop.

**Step 2: Look for matching tasks (TickTick server)**

Call `ticktick-get-tasks` with `title.contains` set to the account name, and again with the subject keywords of each call if the first search is empty. Also call `ticktick-get-completed-tasks` with `title.contains` the account name and `completed-time.from` the same start date. Matching is by account name or subject text only, since the two systems share no id. Treat a task as a match only if it was created on or after the call date.

**Step 3: Report**

A table with one row per call: date, subject, rep, matching TickTick task (title, due date, status) or "no follow-up task". End with the count of calls without a task.

**Rules & Guidelines:**

* `chorus-get-engagements` is on the Chorus server; `ticktick-get-tasks` and `ticktick-get-completed-tasks` are on the TickTick server.
* Do not call `ticktick-add-task`, `ticktick-add-comment`, `ticktick-complete-task`, `ticktick-update-task`, `ticktick-delete-task`, `chorus-add-moment` or any other write tool.

**Validation:**

* If the account name matches several accounts, list the distinct account names and stop.
* If task matching is ambiguous, show both candidates and mark it "possible match".