wip: cave planner squash-merged into wip/combined (L173, RED - not for main)

Five conflicts resolved (CURRENT-STATE, ResolvedLayoutInternal.h, StreamBenchmarkHeadless.cpp,
StreamBenchmarkPipeline.h, WorldAssemblyPrototype.h) keeping liminal + cave planner; L156 band fit only; evaluator v239
with v239 baselines (18/18 Clang/GCC W1/W8/W12). Fast tier FAILS (FI upper arrival: 40 unsupported chamber samples,
10 chamber-floor shell violations); TN and VS composed sweeps 0/16 (passage, seam, shell gates). Living plane loads at
PostConfigInit (UE smoke passes). Source/: VoxelForgeCoreAdapter.cpp; VoxelForge.uplugin.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

Standalone/Research/WorldAssemblerM3/Linux150/RunL150SeedSweep.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+"""Run L147 composed gates on the actual L150 planner HEAD build."""
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+import sys
+
+
+ROOT = Path(__file__).resolve().parents[4]
+SOURCE = ROOT / "Standalone/Research/WorldAssemblerM3/Linux147/RunL147SeedSweep.py"
+spec = importlib.util.spec_from_file_location("l147_seed_sweep", SOURCE)
+if spec is None or spec.loader is None:
+    raise SystemExit("cannot load the L147 composed gate runner")
+runner = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(runner)
+runner.OUT = ROOT / "Saved/Linux/l150/seeds"
+runner.BIN = ROOT / "Standalone/bin/linux/VoxelForgeCoreHeadless-l150-head-clang"
+runner.STAMP = "c6b8a100355e271ddc40eb5973569d2ff4e2ba8d9c628c72f8e0af2493f0609f"
+
+
+if __name__ == "__main__":
+    raise SystemExit(runner.main())