Flexporter updates - October 2024

[dehall]

A few new features for the flexporter:

1. A new if field that can be used in create_resource to conditionally set a field. The use case that inspired this is shown in the unit test - creating ServiceRequest based on Procedure, setting ServiceRequest.authoredOn = Procedure.performed, but Procedure.performed is either a dateTime (ie, primitive) or a Period (ie, an object) so the types need different handling. Previously the only way to do this was with two separate actions with different applicability.
2. Allow deleting resources by FHIRPath instead of just by resource type. The use case that inspired this is deleting some of the SDOH conditions to clean up a record for a demo
3. Allow functions to be nested within definitions. Previously a function call such as getAttribute could only be used as the top-level value, now value can be a map and one of the sub-values can be the function.