[MCC-1514065] Python SDK – Enhance Validation Failure Diagnostics: Expose Invalid Reason in dry_publish() and publish()

[ibaig-mdsol]

enhance

• Replace this line with Project title.
• MCC-1514065

Checklist

• Review the pull request to fix typos and ensure variable/function names are intuitive, etc.
• Make sure the pull request does not have excessive number of unnecessary commits. Utilize the git commit --amend --no-edit command to reduce commit messages when making small file changes (like changing linespacing).
• Make sure you have added unit tests for the code changes. Tests should be added in the tests/ folder.
• Modify docs, if required. Add any new documentation in the doc/ folder.
• Rebase on latest active development branch (develop/main).

Changes Summary

• Handling invalid records in the usage file for publish and dry_publish()

[Copilot]

Pull request overview

Updates the DataConnect Python SDK usage guide to improve diagnostics when dry_publish()/publish() encounter invalid records, by showing additional server-returned details (notably the invalid_records table, which can include invalid reasons).

Changes:

• In the dry publish example, conditionally prints errors, invalid_datetime_formats, and the invalid_records DataFrame when present.
• In the publish example, prints the invalid_records DataFrame when present.

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