create_table :delayed_jobs do |table|
    table.integer :priority, default: 0, null: false # Allows some jobs to jump to the front of the queue
    table.integer :attempts, default: 0, null: false # Provides for retries, but still fail eventually.
    table.text :handler,                 null: false # YAML-encoded string of the object that will do work
    table.text :last_error                           # reason for last failure (See Note below)