imod.wq.SeawatModel().time_discretization() fails on package datetimes before given daterange
One of the packages includes a time before model start. After calling time_discretization(), it gives a ValueError: ValueError: Package chd does not have a value specified for the first time: 1980-01-01T00:00:00.000000000. Every input must be present in the first stress period. Values are only filled forward in time.
Desired behavior is that this check takes the first time from the call to time_discretization as the first time, i/o the first time present in the packages.