Move runner port 18008 -> 18010

Follows the change already made on 4n4rch02. Updates the compose --port and
healthcheck plus every default in the bench tooling and the README, so the
scripts keep working without an explicit --port.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

bench/reasoning_budget_probe.py

@@ -53,7 +53,7 @@ def probe(port, label, extra):
 
 if __name__ == "__main__":
     ap = argparse.ArgumentParser()
-    ap.add_argument("--port", type=int, default=18008)
+    ap.add_argument("--port", type=int, default=18010)
     ap.add_argument("--case", choices=["default", "override", "off"], default="default")
     ap.add_argument("--budget", type=int, default=16384)
     a = ap.parse_args()