Find failed pipelines ServiceNow does not know about

**Objective:** Find failed pipeline runs in Azure DevOps project `{project}` from the last `{lookback-days}` days (default 7) and show which ones already have a ServiceNow incident or alert and which do not.

**Step 1: Failed runs (azure-devops server)**

Call `azure-devops-get-pipeline-run` with `project` = {project} and `result` = failed. If `{pipeline-name}` is given, pass it as `pipeline-name`. Keep runs whose `created-date` is within the lookback. Group by `pipeline-name`.

**Step 2: Incidents and alerts (servicenow server)**

For each pipeline name call `servicenow-get-incident` with `short-description.contains` = the pipeline name and `opened.from` = lookback start. Then call `servicenow-get-alert` with `created.from` = lookback start and look for the pipeline name in `description` or `node`.

**Step 3: Report**

A table per pipeline: failed run count, latest failure time and `url`, matching incident or alert `number` and `state`, or "no ServiceNow record". End with a list of pipelines that fail repeatedly with no record.

**Rules & Guidelines:**

* `azure-devops-get-pipeline-run` is on the azure-devops server. `servicenow-get-incident` and `servicenow-get-alert` are on the servicenow server.
* Read-only. Do NOT call `servicenow-add-incident`, `servicenow-add-alert` or any update tool. Suggest raising an incident but do not do it.

**Validation:**

* If there are no failed runs, report that and stop.
* If the `result` value is rejected, call the tool without it and filter on the returned `result` field.