fix(core): worker-count-dependent tiles near passage support columns (L44); random-camera determinism sweep

L27 added passage support columns, but World::isTileShapeFree only bounded the route and bridge, so tiles
touched by a column could be approved for early native-only generation; depending on scheduling they used
that incomplete field or the compiled one (six LOD0 tiles differed between W1 and W12 at an SW camera near
the arrival mouth). The shape-free proof now includes a conservative envelope for every possible column.
The compiled world is unchanged (the old W1 variant), so no version bump. verify tiers gain a seeded
(SplitMix64 0x4c3434) random-camera W1/W8/W12 sweep across both recipes and several clip settings; it fails
before the fix and passes after. fast/medium/full PASS; cost within noise. Research R11: suspect review.

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

Standalone/Source/StreamBenchmarkHeadless.cpp

@@ -37,6 +37,7 @@ namespace
         bool StreamBenchmark=false;
         bool StreamPipeline=false;
         bool StreamHash=false;
+        bool StreamHashTiles=false;
         bool ProfileColumnOverlap=false;
         bool UseSharedColumnCache=true;
         bool ForceGenerate=false;
@@ -239,6 +240,7 @@ namespace
                 std::printf("Usage: %s [owner_world.json] --world-assembler-prototype --stream-benchmark --stream-pipeline [options]\n"
                     "  --workers=N --clip-radius=N --max-clip-level=N --max-level=N\n"
                     "  --camera=X,Y,Z,YAW,PITCH (position in metres) --stream-hash\n"
+                    "  --stream-hash-tiles (print per-tile hashes; implies --stream-hash)\n"
                     "  --camera-step=X,Y,Z (optional second view step in metres)\n"
                     "  --region-crossing (compile entering Core regions at the camera step)\n"
                     "  --column-cache=shared|thread-local (default: shared)\n"
@@ -292,6 +294,7 @@ namespace
             else if(arg=="--stream-benchmark")options.StreamBenchmark=true;
             else if(arg=="--stream-pipeline")options.StreamPipeline=true;
             else if(arg=="--stream-hash")options.StreamHash=true;
+            else if(arg=="--stream-hash-tiles")options.StreamHash=true,options.StreamHashTiles=true;
             else if(arg=="--profile-column-overlap")options.ProfileColumnOverlap=true;
             else if(arg=="--force-generate")options.ForceGenerate=true;
             else if(arg=="--mesh-coverage")options.MeshCoverage=true;
@@ -795,5 +798,5 @@ int main(int argc,char** argv)
         options.DiagnosticSlowShapeCompileMs,options.AuditBasePageEquivalence,
         options.AuditRouteParity,options.AuditResolvedLayoutBoundaries,
         options.AuditResolvedLayoutPassages,options.AuditStrateTransitions,
-        &resolvedLayout);
+        &resolvedLayout,options.StreamHashTiles);
 }