1D raw_dt hook: recompute state % dt from the CFL condition when
CFL-driven, then return the stored dt (Q2c; body lifted verbatim from
the pre-engine run_solver_steps loop).
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| class(solver_run_context_t), | intent(inout) | :: | ctx |