entity api should return full entity objects of deleted entities

[reubenmiller]

Is your feature improvement request related to a problem? Please describe.

It is more consistent if the list of deleted entity objects is returned in its entirety instead of just the @topic-id field.

It is also easier to interpret the returned data, because the fields are clearly labeled.

Below shows the current behaviour where only the @topic-id field is returned of all of the deleted entities.

$ curl -XDELETE http://localhost:8000/tedge/entity-store/v1/entities/device/child2// | jq
[
  "device/child21/service/service210",
  "device/child210/service/service2100",
  "device/child2100//",
  "device/child210//",
  "device/child21//",
  "device/child22//",
  "device/child2/service/service20",
  "device/child2/service/service21",
  "device/child20//",
  "device/child2//"
]

Describe the solution you'd like

The follow shows the proposed response when deleting an entity (and its children). The response includes the full entity object representation when deleting the entity (though note I just made up some data, so don't look at the values, just the properties).

$ curl -XDELETE http://localhost:8000/tedge/entity-store/v1/entities/device/child2// | jq
[
    {
        "@topic-id": "device/child21/service/service210",
        "@parent": "device/child2//",
        "@type": "service"
    },
  // ..
]

Describe alternatives you've considered

Additional context