Move work item description truncation to work_items_beta
What does this MR do and why?
Moves the description truncation feature from work_items_mvc2 to work_items_beta to enable wider testing.
MR acceptance checklist
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Screenshots or screen recordings
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No change to feature behavior.
| Before | After |
|---|---|
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How to set up and validate locally
- Enable work_items_beta feature flag:
Feature.enable(:work_items_beta) - Open or create a task with a lengthy description (text, images, tables, etc all fine)
- Refresh if you updated the task description — truncation is removed on editing