Create webhook `/history_latest`

[IronicUsername]

Depends on #2, #7

Goal To continuously serve the most recent entry in the TrashTvArchillectHistory we have to query & send every 5 seconds the latest entry in the table ordered by time descending.

Context For this issue, we assume, the investigation in #2 and #7 lead to the conclusion GraphQL + Kafka is the way to go. In order to have something that updates our feed on the frontend, we need a websocket that sends us (ideally every time the table updates we query automatically) the most recent entry in this table sorted by time descending.

Tasks

• [ ] create in api.py the websocket /history_latest which
  • [ ] is a GET
  • [ ] response is a defaultdict and looks like this:

    {
    "UUID_FROM_TrashTvArchillectHistory": {
      "gif_link": "LINK_TO_GIF",
      "archillect_id": "123",
      "timestamp": datetime(TIMESTAMP_FROM_TrashTvArchillectHistory_TO_GIF)
    }
    }

• [ ] test it (ofc)