test: add pinned LES baseline and temporary candidate diagnostics

tests/validation/les/run_gpu.py

@@ -0,0 +1,44 @@
+"""Serial pinned baseline/candidate helper diagnostic; existing CUDA environment only."""
+
+import argparse
+from pathlib import Path
+import subprocess
+import sys
+from prepare import HERE, REPO, materialize, verify_candidate
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--repo", type=Path, default=REPO)
+    parser.add_argument("--device", type=int, default=0)
+    parser.add_argument("--run-gpu", action="store_true")
+    parser.add_argument("--output-dir", type=Path, required=True)
+    args = parser.parse_args()
+    if not args.run_gpu:
+        parser.error("Explicit --run-gpu required; authorized GPU executor only")
+    output = args.output_dir.resolve()
+    output.mkdir(parents=True, exist_ok=False)
+    candidate = materialize(args.repo.resolve(), output / "candidate")
+    verify_candidate(candidate)
+    for mode in ("baseline", "patched"):
+        subprocess.run(
+            [
+                sys.executable,
+                str(HERE / "gpu_probe.py"),
+                "--root",
+                str(candidate / mode),
+                "--device",
+                str(args.device),
+                "--run-gpu",
+                "--output",
+                str(output / (mode + ".json")),
+            ],
+            check=True,
+        )
+    print(
+        "Both raw helper probes completed; this is not solver or turbulence acceptance."
+    )
+
+
+if __name__ == "__main__":
+    main()