Feat/handling retries on sidekiq & set admin user before migrations and rollbacks

[juanmamaffei]

Tries to solve #15 and #16.

As an additional suggestion, part of the initializer should be moved even before environment.rb, because, on the migrations, the password is taken from the mattr accessor of the gem instead of the initializer.

My solution was:

1. Divide the initializer.

# config/initializers/pg_rls_database.rb
require 'pg_rls'

PgRls.setup do |config|
  ActiveRecord::ConnectionAdapters::AbstractAdapter.include PgRls::Schema::Statements

  config.class_name = :my_main_model
  config.table_name = :my_main_model
  config.search_methods = %i[id tenant_id]
  config.password = ENV.fetch('POSTGRES_PASSWORD', 'some_default_password')
end

(the following part should be loaded after Redis initialization)

#config/initializers/pg_rls_session.rb
PgRls.setup do |config|
  config.session_store_server = Rails.application.config_for(:redis).session
  config.session_key_prefix = "_hub_session_#{Rails.env}"
end

Requiring the db initializer on application.rb:

require_relative '../config/initializers/pg_rls_database'

3. Removing the initialization on environment.rb because it is no longer necessary.