Unsuccessful Import User Story

This anticipates the failure to negotiate `@id` and `id` in other software.

I think about it in the IIIF sense. I have a IIIF Presentation API 3 Manifest with `id: "https://not.from.rerum/id/12345"`. I want to put navPlace on it so I use the RERUM Geolocator to generate a new Manifest and it has `"@id":"https://store.rerum.io/v1/id/aeeaeae"`. I did that just to preview what would happen in my system if I gave it an object with navPlace. I go to "https://my.software/page.html?id=https://store.rerum.io/v1/id/aeeaeae" and get `Error: obj.id is undefined`.

Should the `_import()` functionality keep the `id` property if it was supplied with the origin object? That property is removed prior to being inserted in the DB to make sure resulting objects only contain `@id`. This is a Linked Data gray area.

Inizia tracciando la funzionalità di `_import()` e il punto in cui l’`id` dell’oggetto di origine viene rimosso prima dell’inserimento nel database. Riproduci lo scenario IIIF Manifest descritto nell’issue, quindi determina e verifica la gestione prevista dei valori `id` forniti e `@id` generati, in modo che l’oggetto risultante non provochi `obj.id is undefined`.

Scritto dal modello di indicizzazione a partire dal testo della issue.