HOTFIX: Force sys exit if SSM Lookup Fails

[k-macmillan]

Description - What Problem Does This Solve?

SSM lookup is failing and being left in a state that it cannot continue but we are allowing the lambda to still load. This leads to 403 response to Twilio regarding delivery status updates.

Expected Outcomes

• Ensure the lambda exits if it is unable to get the SSM param
• Ticket is understood, and QA has been contacted (if the ticket has a QA label).
• Sprint is added to this ticket and ticket is moved to In Progress
• Point value is assigned to this ticket when the effort is determined
• This work is added to the sprint review slide deck (key win bullet point and demo slide)

QA Considerations

N/A

Additional Info & Resources

[k-macmillan]

PR has been merged. This is good to go!