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/Tools/verify/baselines/README.md

@@ -0,0 +1,13 @@
+# Verification baselines
+
+These inputs are byte-for-byte copies of the historical files consumed by the
+verification gates. The gates now read this tracked directory instead of
+`Saved/Linux`, which is generated and is not present in a fresh checkout.
+
+- `owner-hash/`: L46, L52 and L53 diagnostics plus the pinned v212/v214 owner hash baselines.
+- `historical-controls/`: L35, L36 and L38 regression-control logs.
+- `fixtures/`: Linux25 owner JSON inputs and L33 style-override fixtures.
+- `landmarks/`: L45–L48 landmark mesh and layout controls.
+- `mouth/`: L35–L37 mouth-shape controls.
+- `ring/`: L30/L31 negative ring controls.
+- `capture/`: L34 reference camera records.