Set meaningful worksheet title for pivot table XLSX exports

[NA-V10]

Overview

This PR sets a meaningful worksheet title for pivot table XLSX exports instead of using the default "Sheet" name.

Changes

• Use the aggregated fact label as worksheet title when available
• Fall back to the report title if needed
• Fall back to "Report" if neither is available
• Sanitize worksheet titles to remove invalid Excel characters
• Truncate worksheet titles to Excel's 31-character limit

Example

Before:

• Sheet

After:

• Number of Shipments
• Sent Quantity
• Number of Items

[NA-V10]

Thanks for reviewing! If any changes or adjustments are needed, I'd be happy to update the PR.

[nursix]

The fix looks right - however, I cannot merge this for two reasons:

1. You submitted the pull request to the master branch, but pull requests are only accepted for the dev branch.
2. This PR contains a commit for a previously dismissed issue, probably because you branched off your previous story branch rather than current dev.

So I have to ask you to redo this fix on a clean dev copy, and then re-submit the PR to the correct branch.
Please see our code contribution guideline how to do this - and also note the Best Practices section on that page.

[NA-V10]

Thanks for the review. I understand the issue now.

I created a fresh branch from the correct base branch, cherry-picked only the relevant commit for this fix, and opened a new PR targeting dev without the unrelated dismissed issue commit.

Please take a look when you have time. Thanks again!