Starts the default Magika.Server under a supervisor when the :magika
application boots.
The model is loaded once and hosted for the lifetime of the application; the
API in Magika resolves this server automatically.
The only configurable knob is the prediction mode (see Magika for what the
modes mean), set in your application config:
config :magika, prediction_mode: :best_guessIt defaults to :high_confidence.