Add Mission Model Refresh Types Error API Docs

[Mythicaeda]

Docs Ticket for NASA-AMMOS/aerie#1418.

Add API Docs for the Mission Model showing how to query for Hasura Event logs.

Example query:

query {
  mission_model{
    id
    refresh_activity_type_logs { success }
    refresh_resource_type_logs { success }
    refresh_model_parameter_logs { success }
  }
}