Pass TTR StringValue as a string

[timkelty]

Q	A
Is bugfix?	✔️

A recent AWS SDK release throws an error if a StringValue value is passed as a non-string:

[web.ERROR] [yii\base\ErrorException:512] The provided type for `MessageAttributes -> TTR -> StringValue` value was `integer`. The modeled type is `string`.

[what-the-diff]

PR Summary

• Update to Time-To-Run Message Attribute in Queue Handling
  The system used to handle queued processes has been upgraded. Specifically, the time-to-run (TTR) attribute of the messages being processed can now dynamically adapt to different needs, improving the efficiency and flexibility of the queuing system.