wip: cave planner route support fixed (L134 design 3); clearance at edge joints open

Arrival edge floor aligned to the passage mouth, 0.75 m backbone floor-support budget, anchors on the planned floor:
0 unsupported, 0 grade failures. Open: 196/50,967 capsule samples blocked where a higher descending edge's floor
backing meets the next edge (route-edge-6/7).

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

Standalone/Source/StreamBenchmarkPipeline.h

@@ -1684,7 +1684,7 @@ namespace StandaloneStreamBenchmark
         if(mouthBinding)
         {
             const auto qOffset=static_cast<std::int64_t>(std::llround(
-                250000.0*WorldAssemblySubvoxelsPerVoxel/layout.coreVoxelSizeMicrometres));
+                1000000.0*WorldAssemblySubvoxelsPerVoxel/layout.coreVoxelSizeMicrometres));
             const auto& start=routeAnchors.front()->values;
             const auto& end=routeAnchors.back()->values;
             mouthBinding=start[0]==arrival->lowerMouthSubvoxels[0]
@@ -5071,7 +5071,7 @@ namespace StandaloneStreamBenchmark
                         return equalPosition(authored,mouth);
                     auto expected=mouth;
                     expected[2]+=static_cast<std::int64_t>(std::llround(
-                        250000.0*VoxelForgeCore::WorldAssemblySubvoxelsPerVoxel
+                        1000000.0*VoxelForgeCore::WorldAssemblySubvoxelsPerVoxel
                             /World.CoreVoxelSizeMicrons));
                     return equalPosition(authored,expected);
                 };