Return an array with axes laid out as documented for JSON output.
TD response vectors originate in Fortran as ``(N_DRF, N_States)``. The
tag-array bridge exposes the contiguous buffer with that shape to NumPy,
whose default C-order interpretation groups adjacent values by the second
axis. Rebuild these arrays from their state-major buffer so JSON rows are
DRFs and columns are states. This conversion is intentionally limited to
serialization; the runtime/tag-array representation remains unchanged.