fix: L37 Core compile error (stray paren) and Unreal-side issues from review R2

ShapeWorldInternal.h kept an extra ')' after a diagnostic edit was restored post-build, so the L37
commit did not compile; the fixed build reproduces L37's verified owner-world hashes exactly.
Unreal (uncompiled here): SetHardTransitionFallbackForAssembly is const over a mutable runtime flag
(the adapter calls it through a const manager); the legacy fallback clears the flag; VoxelStrateManager
includes <cmath> for std::llround. Adds research R2 (read-only Unreal compile/behaviour review).

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

Standalone/Core/src/ShapeWorldInternal.h

@@ -1551,7 +1551,7 @@ public:
             if(passage.controlPoints.size()<2)continue;
             const bool tileHasSupport=passageTileScopeMatches;
             if(!tileHasSupport
-                ||ActivePassageTileQueries->hasMouthSupport(passageIndex)))
+                ||ActivePassageTileQueries->hasMouthSupport(passageIndex))
                 composeRouteMouthSupport(passage.upperStrateIndex,
                     passage.upperMouthSubvoxels,true);
         }