CCM-14202 - Backward-Compatible Event Processing

[rhyscoxnhs]

Description

Context

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming
• If I have used the 'skip-trivy-package' label I have done so responsibly and in the knowledge that this is being fixed as part of a separate ticket/PR.

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• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.

[Copilot]

Pull request overview

Adds focused unit test coverage for transforming core domain “status published” CloudEvents into backward-compatible client callback payloads in the client-transform-filter Lambda.

Changes:

• Added transform pipeline tests validating MessageStatus/ChannelStatus attribute mapping (including failure fields), payload type, and message link.
• Introduced reusable fixtures for message-status and channel-status core domain events plus expected attribute objects.
• Added a small test utility to extract typed attributes from a callback payload.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
lambdas/client-transform-filter-lambda/src/tests/utils/payload-comparator.ts	Adds helper functions to extract typed attributes from transformed callback payloads for assertions.
lambdas/client-transform-filter-lambda/src/tests/services/transform-pipeline.test.ts	Adds end-to-end-ish transformer tests asserting transformed attributes, types, and links for both event kinds.
lambdas/client-transform-filter-lambda/src/tests/fixtures/core-domain-events/message-status-event.ts	Adds message status CloudEvent fixtures and expected transformed attributes (including failure variant).
lambdas/client-transform-filter-lambda/src/tests/fixtures/core-domain-events/channel-status-event.ts	Adds channel status CloudEvent fixtures and expected transformed attributes (including failure variant).

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