Calcasa-api

- Dates are now serialized in the ISO date-only format `yyyy-MM-dd` to stop any confusion around timezones and are all assumed to be in UTC.
- `peildatum` in `WaarderingsInputParameters`
- `datum_bestemmingplan` in `Bestemmingsdata`
- `datum_laatste_onderzoek` in `Bodemdata`
- `verkoopdatum` in `Referentieobject`
- `verkoopdatum` in `VorigeVerkoop`
- `waardebepalingsdatum` in `Modeldata`
- Reintroduced the `WaarderingWebhookPayload` model that was omitted.

- Added extra field `peildatum` to the `WaarderingInputParameters` model.

- Updated all reported OAuth2 scopes and reduced the superflous scope information on each endpoint.