ufv_frame_orthogonality_residual
================================

.. py:function:: t3toolbox.backend.ufv_operations.ufv_frame_orthogonality_residual(data)

   .. code-block:: python

      def ufv_frame_orthogonality_residual(data):  # UT3Frame .data -> max orthogonality deviation, per stack element


   Max deviation of the four masked frame supercores from orthonormality, **per stack element** (shape
   ``stack_shape``). Each masked supercore slice IS a hypothetical ragged core (mask the padding to zero);
   require its Gram == ``diag(outgoing_mask)`` -- the masked-Gram pattern, over the four senses (up ``U``,
   down/outer ``O``, left ``L``, right ``R``), with the correct outgoing mask per sense (left core ``i`` ->
   ``frame_left_mask[i+1]``). The uniform analog of
   :py:func:`fv_operations.fv_frame_orthogonality_residual`; the per-element oracle is the ragged
   one via ``to_t3frame``. The boundary left/right cores are remainders and are not checked (so left
   checks cores ``0..d-2``, right checks ``1..d-1``).