Feature request: populate middy's `request.internal` with cleanup function for Metrics

[dreamorosi]

Use case

In the previous release we introduced a new shared function in the commons package that allows Middy middleware authors to call a cleanup function whenever their middleware has to return early. This allows other Powertools utilities that might be present in the Middleware stack to run their cleanup logic.

In the case of Metrics this means flushing any stored metric to avoid delays in the reporting or potential (if unlikely) data loss.

Solution/User Experience

See PoC in the initial feature proposal.

Alternative solutions

No response

Acknowledgment

• This feature request meets Powertools for AWS Lambda (TypeScript) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET

Future readers

Please react with 👍 and your use case to help us understand customer demand.

[github-actions]

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[github-actions]

This is now released under version 1.10.0!