trace: Unreal timing traces run without hash capture (L71); verify baselines tracked

The L70 "2x SurfaceWorld GenerateTile in Unreal" was the instrument: the trace enabled
bCaptureVoxelForgeCoreHashesForValidation, which disables the native heightfield-band
shortcut and whole-tile skips (W1 same keys: 9.00 s hash-off vs 28.46 s hash-on). With
hashing off, Unreal and headless match at W8 within 1.2-2.5% (Core 14.42 s vs 14.26 s) on
identical tile keys. LOD0 p95 tail = real cost of non-empty passage tiles near the spawn mouth
(p50/p95 18.8/105 ms); most LOD0 tiles are empty.

verify.py reads its baselines from Standalone/Tools/verify/baselines/ instead of untracked
Saved/Linux. The 11 .vfmesh control meshes (~78 MB) are not committed yet (to be stored
compressed). Fast tier green.

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

Standalone/Research/WorldAssemblerM3/Linux37/RunRingAuditsL37.py

@@ -10,6 +10,7 @@ import os
 from pathlib import Path
 
 ROOT = Path(__file__).resolve().parents[4]
+BASELINES = ROOT / "Standalone/Tools/verify/baselines"
 OUT = Path(os.environ.get("VOXELFORGE_VERIFY_OUT", ROOT / "Saved/Linux/l37"))
 BIN = Path(os.environ.get("VOXELFORGE_VERIFY_HEADLESS",
                           OUT / "bin/VoxelForgeCoreHeadless-l37-final-clang"))
@@ -177,9 +178,9 @@ for label, recipe, surface, window_min, window_max, camera0, camera1, centers in
 
 # Keep the established L30 terrace and L31 flat-surface negative controls live.
 controls = (
-    ("l30-terrace", ROOT / "Saved/Linux/l32/fi-floor-l30-camera-negative.vfmesh",
+    ("l30-terrace", BASELINES / "ring/l32-fi-floor-l30-camera-negative.vfmesh",
      -130.0, -110.0),
-    ("l31-flat", ROOT / "Saved/Linux/l31/fi-floor-v19.vfmesh", -122.0, -117.0),
+    ("l31-flat", BASELINES / "ring/l31-fi-floor-v19.vfmesh", -122.0, -117.0),
 )
 for name, mesh, height_min, height_max in (() if OPTIONS.skip_controls else controls):
     result, output, _ = run(f"control-{name}", ["python3", TERRACE, mesh,