What should we add?

It's been decided that moving into Qiskit 2.0 we'll be removing the pulse module and all the related functionality (such as the schedule function along with it's backing module and calibrations in the target) as it's not in scope for the direction of the project anymore. We should ensure that we mark all these features as deprecated in 1.3.0 so there is sufficient warning prior to the release of Qiskit 2.0. These features will continue to be supported in Qiskit through the EoL with the 1.x.y release series into the 2H of 2025.