Implements backend support for additional fields on vendor records by:
- Adding AdditionalFields mixin to Bookseller/Booksellers classes
- Defining additional_field_values and extended_attributes relationships
in Aqbookseller schema with proper table name filtering
- Updating REST API controller to handle extended_attributes during
vendor creation and updates
- Adding vendor to AdditionalField resource type mapping
This provides the ORM-level support needed for vendors to have custom
additional fields, matching the existing pattern used for other resource
types like agreements, packages, and orders.
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@openfifth.co.uk>
Signed-off-by: Michaela <michaela.sieber@kit.edu>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
0c4ccf6d6f