- Update to 1.5.7:
  UI
  --    
  - Added a new "hosts" page to browse and search reports by host name
  - Improved page HTML titles to be dynamic based on the context
  - Added a note highlighting if a task has been delegated to another host
    (https://github.com/ansible-community/ara/issues/282)
  - Improved how long file paths or playbook names are truncated and displayed
  API
  ---
  - Added a new read-only API endpoint: /api/v1/latesthosts
    It provides the latest playbook result for each host name.
    Under the hood, it implements the machinery for updating the latest host
    every time a host is created or deleted and includes a SQL migration to
    initially populate a new database table with the latest hosts.
  - Added a `delegated_to` field to results in order to record a host id to which
    a task has been delegated.
  - Added support for finding results delegated to a specific host:
    /api/v1/results?delegated_to=<host_id>
  Callback plugin
  ---------------
  - Fixed tasks and results being recorded out of order when using "strategy: free"
    (https://github.com/ansible-community/ara/issues/260)
  - Added support for recording 'delegate_to' on tasks
  Documentation
  -------------
  - Removed an unused sphinx lexer to allow recent versions of sphinx>=4
  - Created a new troubleshooting guide with common issues:
    https://ara.readthedocs.io/en/latest/troubleshooting.html
  - Added a database relationship graph to the endpoint documentation:

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