Add quiet smoke reporting

docs/prompt-pool-routing-map.md

@@ -948,8 +948,12 @@ To inspect or run a focused path while editing one route:
 ```bash
 python tools/prompt_smoke.py --list
 python tools/prompt_smoke.py --case krea_format_route_policy --case sdxl_format_route_policy
+python tools/prompt_smoke.py --quiet
 ```
 
+Use `--quiet` when you only need pass/fail output for the selected cases or the
+full suite.
+
 The script does not import ComfyUI. It builds representative metadata rows and
 pair metadata through the core Python APIs, then verifies: