Refactor ElkSharp hybrid routing and document speed path

src/__Libraries/StellaOps.ElkSharp/ElkEdgePostProcessor.UnderNode.cs

@@ -1585,6 +1585,7 @@ internal static partial class ElkEdgePostProcessor
         return path.Count >= 2
             && !ElkShapeBoundaries.IsInsideNodeBoundingBoxInterior(targetNode, path[^2])
             && !HasExcessiveGatewayDiagonalLength(path, targetNode)
+            && !HasShortGatewayTargetOrthogonalHook(path, targetNode)
             && ElkShapeBoundaries.HasValidGatewayBoundaryAngle(targetNode, path[^1], path[^2]);
     }
 
@@ -2616,4 +2617,4 @@ internal static partial class ElkEdgePostProcessor
         return CloneEdgeWithKind(edge, AppendInternalKindMarker(edge.Kind, ProtectedUnderNodeKindMarker));
     }
 
-}
+}