wip(step2e): parameterised chamber-graph model -- compiles, traversal test PASS; benchmark not run

Stopped by low memory (another app held 12.5 GB; processes failed with 0xC0000142).
Editor-only, default off: a seeded connected room graph (varied chambers on a spanning network,
optional loops, shafts, rock features, ledges, basin floors), eight parameter profiles, the
step-2d brick driver and detail bands, a new test VoxelForge.ParameterizedGeneration.TraversalSeeds
(PASS in step2e_functional_01, which also proves the tree compiles). Existing live tests untouched.
Not yet run: the eight-profile ring benchmark, variety metrics, slices, detail/artefact/determinism
checks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ

Source/VoxelForgeEditor/Private/VoxelForgeRegionEvalExperiment.h

@@ -144,7 +144,8 @@ namespace VoxelForgeRegionEval
         float DetailScale,
         TArray<float>& OutDensities,
         FTiming& OutTiming,
-        bool bEnableBrickSkips = true);
+        bool bEnableBrickSkips = true,
+        bool bParameterized = false);
 
     /** Count exact room/tunnel/core/passage candidate visits with instrumentation enabled. */
     FCandidateVisits CountCandidates(