[Feature] AWS x-ray tracing, for Observability

[Cameronsplaze]

Is your feature request related to a problem? Please describe.

Have a dashboard that lets you see the request move through the stack. Useful for debugging, and testing to see if nothing broke.

This is technically blocked by #4, since adding xray to lambda is a single line in powertools. (Just always have that line there, and you can enable/disable it in the cdk lambda construct props).

Describe the solution you'd like

• Requests through lambdas (boto3 spins up/down ASG) gets traced.
• ASG spinning up, triggering ASG-StateChange Lambda gets traced too.
• Entire x-ray part can be enabled/disabled inside of leaf config. (Might be free-tier, but just-in-case).
• See if there's an x-ray widget that needs to be added to the dashboard.

Describe alternatives you've considered

Just leave it as is. This would be nice to have, but isn't in any way a priority.

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

[Cameronsplaze]

Sooo.... It looks like x-ray might be discontinued for OpenTelemetry? Or one uses the other? https://docs.aws.amazon.com/xray/latest/devguide/xray-sdk-migration.html#migration-to-opentelemetry.

OpenTelemetry docs: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-OpenTelemetry-Sections.html

• Specifically for python here

OpenTelemetry Lambda Layer: https://aws.amazon.com/blogs/opensource/auto-instrumenting-a-python-application-with-an-aws-distro-for-opentelemetry-lambda-layer/

However the CDK docs still use x-ray, and x-ray isn't discontinued until 2027, so maybe CDK hasn't updated to OpenTelemetry yet? The flag isn't deprecated, so maybe it's more of a 'drop-in' replacement?