Add partijIdentificatoren to the expand options for Partij list and retrieve

[swrichards]

Thema / Theme

Klantinteracties API

Omschrijving / Description

For both the partijen list and retrieve methods, support expanding all partij-identificator objects for a partij through the expand key.

Toegevoegde waarde / Added value

Partij identificatoren are the main way OIP (and presumably others) correlate the Partij resources with other information in their systems. Given a (list of) Partij objects, it's a hindrance to have to perform additional lookups to find the corresponding identificatoren for a Partij, especially when it concerns a list of such resources. Allowing this resources to be included via the expand parameters for both list and retrieve views would simplify the request flow.

Aanvullende opmerkingen / Additional context

No response