Fix rake tasks

[darokel]

Tried to run one of the rake tasks in Publish and it was complaining about structure of args. This PR introduces a couple of fixes:

• Fixes rake task :import_all_entities, eg:

NameError: undefined local variable or method `entities_for_analytics' for main:Object

      entities_for_analytics.each do |entity_name|

• Fixes rake task :import_entity to correctly destructure args otherwise we get:

ArgumentError: wrong number of arguments (given 1, expected 0; required keyword: entity_name)

• Pins async gem to a version that hasn't been yanked

Also pinned the async gem to a version that hasn't been yanked, let me know if this is ok.

[misaka]

Just to add context, apply and register are still on Ruby 2.7.x, which is why despite the Ruby version being set to 3.1.2 in .tool-versions, we never encountered this error. The are also no tests for that slim bit of the code in the task.

[misaka]

🚀