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/spec_bench.py

@@ -61,7 +61,7 @@ def run(port, name, prompt, n_predict, no_think):
 
 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("--label", default="run")
     ap.add_argument("--n-predict", type=int, default=400)
     ap.add_argument("--no-think", action="store_true",