autodiff
CVXPy visitors for user-supplied Jacobians.
Visitors: WithJacobian
A WithJacobian override reshapes a linearization, and linearization happens
on the JAX path. The convex subproblem sees convex constraints verbatim, with no
derivative taken, so the wrapper has nothing to act on here and raises
NotImplementedError — the same treatment CTCS gets for being a
JAX-side construct.