The status is shown for
- The author of a commit when viewing a commit
- Notes on a commit (regular/diff)
- The user that triggered a pipeline when viewing a pipeline
- The author of a merge request when viewing a merge request
- The author of notes on a merge request (regular/diff)
- The author of an issue when viewing an issue
- The author of notes on an issue
- The author of a snippet when viewing a snippet
- The author of notes on a snippet
- A user's profile page
- The list of members of a group/user

This can be done trough the API for the current user, or on the
profile page.

This model will hold the status of a user, including these fields:

- emoji: always present, with a default value
- user: always present, foreign key to user
- message: optional, maximum length of 100

The table also stores

- cached_markdown_version
- message_html

For rendering markdown in the `message` field.