Record the root cause on a ServiceNow problem in one step

**Objective:** Record the root cause `{cause-notes}` and workaround `{workaround}` on problem `{problem-number}`, move it to Fix in Progress, and close its root cause analysis task.

**Step 1: Read the problem and its tasks**

* Call `servicenow-get-problem` with number `{problem-number}`. Keep sys-id, state and assigned-to. If it is Resolved or Closed, stop.
* Call `servicenow-get-problem-task` with problem `{problem-number}`. Pick out open tasks of type Root cause analysis and keep their sys-ids.

**Step 2: Confirm**

Show: the problem, current state, new state Fix in Progress, the cause notes, the workaround (or "none"), and which RCA tasks will be closed. Ask for an explicit yes.

**Step 3: Write**

1. Call `servicenow-update-problem` once with sys-id, cause-notes `{cause-notes}`, workaround `{workaround}` only if given, state Fix in Progress, and work-notes "Root cause recorded."
2. For each open RCA task from Step 1, call `servicenow-update-problem-task` once with its sys-id, cause-notes `{cause-notes}`, state set to the closed-complete value the tool lists, and a close-code if the tool requires one (ask the user if unsure).

**Step 4: Verify and report**

Re-read with `servicenow-get-problem` and `servicenow-get-problem-task`. Report the new state and which tasks closed. If a workaround was given, suggest running draft-knowledge-from-problem so the service desk can find it.

**Rules & Guidelines:**

* Write tools allowed: `servicenow-update-problem` once and `servicenow-update-problem-task` once per open RCA task, after one confirmation. Do not touch non-RCA tasks and do not call any add- tool.
* Do not set resolution-code here; the problem is not resolved until the fix is in.

**Validation:**

* If there is no open RCA task, update only the problem and say so.