When `#perform_later` is called the locale isn't stored on the
queue, which results in a locale reset when the job is performed.
An example of the problem:
I18n.locale = 'de'
HelloJob.perform_now # german message, correct
but
I18n.locale = 'de'
HelloJob.perform_later # english message, incorrect
This PR attaches the current I18n.locale to every job during the
serialization process. It is then restored during deserialization
and used to perform the job with the correct locale.
It falls back to the default locale if no serialized locale is
found in order to provide backward compatibility with previously
stored jobs. It is not necessary to clear the queue for the update.
Unfortunately, the HashWithIndifferent access approach is insufficient
for our needs. It's perfectly reasonable to want to use keyword
arguments with Active Job, which we will see as a symbol keyed hash. For
Ruby to convert this back to keyword arguments, it must deserialize to a
symbol keyed hash.
There are two primary changes to the serialization behavior. We first
treat a HWIA separately, and mark it as such so we can convert it back
into a HWIA during deserialization.
For normal hashes, we keep a list of all symbol keys, and convert them
back to symbol keys after deserialization.
Fixes#18741.
