fix(tool-jobs): restore the background-job guidance text

The rewrite carried an older wording of the system-prompt section; the
recorded-session snapshots pin the current one. Model-visible text is
byte-identical to the pre-refactor plugin again.

packages/jobs/tool-jobs/src/index.ts

@@ -249,7 +249,7 @@ export function apply(ctx: Context, config: Config): void {
   ctx.systemPrompt.section({
     name: 'tool:jobs',
     order: ctx.systemPrompt.getSectionOrder('TOOL_JOBS'),
-    text: 'Track every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not stop your turn just to wait. Use job_output when you need its output now. Use job_kill to stop a job you no longer need.',
+    text: 'Track every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job\'s work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.',
   })
 
   // Jobs whose terminal state this plugin already handed to the model through