Date(time) fields converted to Nullable, even when they're part of the primary key

[dlouseiro]

WIth the current implementation of the target, all date and datetime fields received from a tap are converted to Nullable, even when they're part of the table's primary key/order by, which causes the synchronisation to fail.

My proposal would be for the Date(time) field to only be converted to Nullable when they're not part of the table's primary key.

[dlouseiro]

Created a proposal of implementation here