fix(monitoring): withdraw URI without :443 and show perf ms

scripts/taler-monitoring/README.md

@@ -94,6 +94,22 @@ E2E maps failures to blockers, e.g.:
 - `Alarm clock` during pay → usually missing `handle-uri --yes` or wrong pay URI (must be `…/instances/{inst}/{oid}/?c={token}` from merchant `taler_pay_uri`)
 - `insufficient balance` → withdraw incomplete  
 
+## Performance (urls phase)
+
+Outside-in HTTPS RTT for bank / exchange / merchant critical paths. Each probe prints
+`HTTP … · N ms` on the `[OK]`/`[WARN]`/`[ERROR]` line; end of the block prints
+`perf summary` (n / min / p50 / avg / max).
+
+| Env | Default | Meaning |
+|-----|---------|---------|
+| `PERF_WARN_MS` | `8000` | WARN if latency ≥ this |
+| `PERF_FAIL_MS` | `20000` | ERROR if latency ≥ this |
+| `PERF_CURL_TIMEOUT` | `25` | curl max seconds per probe |
+
+```bash
+PERF_WARN_MS=3000 PERF_FAIL_MS=10000 ./taler-monitoring.sh urls
+```
+
 ## Needs
 
 - SSH `koopa` (inside/sanity server bits)