response: copy addenda05 records over

[adamdecaf]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @adamdecaf, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the ACH file processing capabilities by ensuring that Addenda05 records are properly copied and persisted during batch mirroring operations. The changes address a gap in data preservation for these specific addenda types, and new tests have been implemented to verify the correct behavior across different file transformation scenarios, thereby improving the reliability and completeness of ACH file handling.

Highlights

• Addenda05 Record Handling: The system now correctly includes Addenda05 records when writing batch mirror data, ensuring these details are preserved during processing.
• New Test Coverage: A new comprehensive test suite (TestFileTransform_Addenda) has been added to validate the proper handling of Addenda05 records across various file transformation actions, including returns, corrections, and copies.
• Test Data: A new ACH test file (with-addenda.ach) containing Addenda05 data has been introduced to support the new test cases and ensure robust validation.

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[gemini-code-assist]

Code Review

This pull request adds functionality to copy Addenda05 records when mirroring ACH entries. The core logic change is in pkg/response/batch_mirror.go, and it's supported by a new test case in pkg/response/file_transformer_test.go using a new test data file.

My review has a few suggestions:

• The addenda copying logic is specific to Addenda05. It would be more robust to handle other addenda types, like Addenda02, to prevent data loss with other SEC codes.
• The new test has a minor copy-paste error in a comment.
• The structure of the new test could be improved to make the sub-tests independent, which would enhance maintainability.