Amazon Connect Voice integration improvements

The Amazon Connect voice integration now supports two new capabilities:

Pass metadata from Amazon Connect to Ada — The Ada-Get-Call-ID Lambda can now be used to send metadata from Amazon Connect to Ada at the beginning of a conversation. Values sent will be available in Ada as purple metavariables.
More clearly identify if a call should continue in Amazon Connect — The Ada-Get-Transfer-Data Lambda response now includes a should_continue field. If the value of this field is true, that means that Ada escalated the call to a human agent and the call should continue in Amazon Connect. If the value of this field is false, that means that either Ada or the end user ended the call without escalation and the call should be ended in Amazon Connect.

Both changes are backwards compatible. Existing Lambda implementations using GET requests continue to work without modification.