fix: correct column order in workflow UNION query to fix sorting

[rishiraj-58]

Summary

This PR fixes the reversed workflow sorting behavior where "Sort by last updated" was sorting by creation date and "Sort by last created" was sorting by update date.

Root Cause

The commonFields object in buildBaseUnionQuery() method had columns ordered as { createdAt, updatedAt, ... }, but the actual entity columns (defined by the WithTimestamps base class) are ordered as { updatedAt, createdAt, ... }. This mismatch caused the SQL UNION query to swap data between these two columns when fetching workflows and folders together.

Changes

• Reordered commonFields in workflow.repository.ts line 151-156 to match the actual entity column order
• Changed from { createdAt: true, updatedAt: true, ... } to { updatedAt: true, createdAt: true, ... }

Testing Results

Before fix:

• Clicking "Sort by last updated" → workflows sorted by creation date ❌
• Clicking "Sort by last created" → workflows sorted by update date ❌

After fix:

• Clicking "Sort by last updated" → workflows sorted by update date ✅
• Clicking "Sort by last created" → workflows sorted by creation date ✅

Test Steps:

1. Navigate to workflows page
2. Create or update several workflows at different times
3. Test "Sort by last updated" - should show most recently updated first
4. Test "Sort by last created" - should show most recently created first
5. Verify "Last updated" timestamps match the sort order

Notes

• This fix aligns with the existing comment on lines 173-178 about column ordering being "load-bearing"
• Related to the tech debt issue: https://linear.app/n8n/issue/ADO-4376/tech-debt-investigate-and-fix-root-cause-of-incorrect-sql-column

Related Linear tickets, Github issues, and Community forum posts

Closes #22016

Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

---

Note

Reorders commonFields in workflow.repository.ts so updatedAt precedes createdAt, aligning UNION select column order to map timestamps correctly and fix sorting by updated/created.

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[n8n-assistant]

Hey @rishiraj-58,

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• Tests are included for any new functionality, logic changes or bug fixes.
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[cubic-dev-ai]

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