Fix CSV export mismatch when filtering by epic

Vedant Jainrequested to merge
issue#415841 into master

What does this MR do and why?

Fix CSV export mismatch when filtering by epic

Ensure CSV export includes subepic issues to match the UI display when filtering by epic.

Changelog: fixed

References

Relates to #415841 (closed)

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Exported CSV content Project issue list filter
Screenshot_2025-07-21_at_12.00.36_AM Screenshot_2025-07-21_at_12.01.19_AM

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Edited by Vedant Jain

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