Put a next step on every stalled Pipedrive deal

**Objective:** Find the open deals in `{pipeline-name}` (default: all pipelines) owned by `{owner-name}` (default: all owners) that have no next step, and schedule a follow-up on each, due in `{due-in-days}` days (default 2).

**Step 1: Resolve the filters**

* If `{owner-name}` is given, call `pipedrive-get-user` with `name.contains`. If more than one matches, list them and stop.
* If `{pipeline-name}` is given, call `pipedrive-get-stage` with `pipeline-name` to get its stage-ids.
* Call `pipedrive-get-activity-type` with `active` = true and confirm the call key exists.

**Step 2: Find the stalled deals**

Call `pipedrive-get-deal` with `status` = open (per `stage-id` if a pipeline was given, and `owner-id` if resolved). For each deal call `pipedrive-get-activity` with `deal-id` and `done` = false. A deal with no open activity is stalled.

**Step 3: Propose, then wait**

Show a table of the stalled deals, highest value first, with the follow-up you would add to each: type call, subject "Follow up: " plus the deal title, due date. Propose at most 25 per run. Wait for explicit confirmation; the user may drop deals or change subjects.

**Step 4: Write**

For each approved deal, one `pipedrive-add-activity` with `deal-id`, `type`, `subject` and `due-date`.

**Step 5: Confirm**

Re-read with `pipedrive-get-activity` (`deal-id`, `done` = false) for each deal and report which follow-ups landed.

**Rules & Guidelines:**

* Only `pipedrive-add-activity` may write, once per approved deal.
* Do not call `pipedrive-update-deal` or `pipedrive-update-activity`.
* Never schedule on won, lost or deleted deals.
* If a filter on `owner-id` returns nothing when you expect records, run the same read without it and keep the rows whose owner-name matches the user instead.

**Validation:**

* If every open deal already has a next step, say so and stop.
* If `{due-in-days}` is not a whole number, use 2 and say so.