fix(skills): resolve session resolution, add cancelled event status, and scope mqtt topic

.agents/skills/multi-agent-mux-loop/scripts/run_loop.sh

@@ -147,6 +147,9 @@ except Exception:
     elif [ "$status" = "error" ]; then
       log_error "Job '$job_id' finished with errors."
       return 1
+    elif [ "$status" = "cancelled" ]; then
+      log_error "Job '$job_id' was cancelled."
+      return 1
     fi
     sleep "$check_interval"
   done