fix(scheduler): reuse one execution session per scheduled job

Reuse channel_session_v2 per job_id so cron runs do not create a new
oclaw session each time; isolate scheduled turn context to the active
turn_uuid so shared sessions do not leak prior run history.

Co-authored-by: Cursor <cursoragent@cursor.com>

runtime/scheduler/service.py

@@ -46,7 +46,6 @@ def enqueue_scheduled_job_run(
             store,
             job=job,
             created_by_user_id=str(getattr(job, "created_by_user_id", "") or ""),
-            run_id=str(run.id),
         )
     except Exception as exc:
         store.scheduled_job_run_update(