Description:
  Generates the necessary migration to enable field tracking for logux updates

Examples:
  rails generate logux:model User

    This will generate the migration to add a column with update time data.

  rails generate logux:model User --nullable

    This will generate the migration to add a column with update time data and add `null: false` constraint. Be careful, adding the constraint to the table with a big number of rows can cause lots of locks.