* Adds "shipment_address" attribute to the SalesOrderShipment model:
- Allows different addresses for each shipment
- Defaults to the order shipment address (if not specified)
* Add unit testing for field validation
* Update SalesOrderShipment serializer
* Edit shipment address in UI
* Render date on shipment page
* Improve address rendering
* Update docs
* Bump API version
* Update CHANGELOG.md
* Fix API version
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