Delete address

Delete an address belonging to the authenticated user.

Use this endpoint to remove obsolete or incorrect addresses from the user address book.

Behavior notes:

• The address is removed by id from the authenticated user's address set.
• Returns 204 on success with no response body.
• Returns 404 if the address id does not exist or is not owned by the current user.
• If the deleted address was primary, another address of the same type may become primary.

Recommended follow-up:

1. Call GET /user/addresses after deletion.
2. Refresh UI state using the updated list, including primary indicators.