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)