Four-Dimensional Boundary-Leaf Foliation from Exact Six-Dimensional Hybrid Geometry

Building on the hybrid propagation geometry developed in Paper 4, this paper derives its exact dimensional structure. The regular QII continuation geometry is shown to be exactly six-dimensional through independent lower- and upper-bound arguments. A nonzero survival-order covector then yields a five-dimensional QII Horizon, while positive-radial normalization produces a four-dimensional normalized Boundary and corresponding Boundary-leaf foliation. The resulting hierarchy is derived without assuming a six-dimensional physical spacetime or compactifying two postulated spacetime dimensions. Physical-spacetime realization remains a separate open problem.