Data Carousel: fix incorrect no_staging when reusing DDM rule

[mightqxc]

No description provided.

[Copilot]

Pull request overview

This PR fixes a bug where datasets reusing existing DDM (Distributed Data Management) rules were incorrectly marked with no_staging=True. The fix ensures these datasets are properly tracked as "staging" datasets rather than "no staging" datasets.

Key Changes:

• Added to_reuse_ds_list tracking to identify datasets that reuse existing DDM rules
• Updated logic to add reused datasets to to_staging_datasets instead of leaving them untracked
• Commented out the code that was adding reused datasets to to_pin_ds_list (not expected in this case)

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
pandaserver/taskbuffer/DataCarousel.py	Adds to_reuse_ds_list to the return map, populates it when existing DDM rules are found, and comments out unexpected to_pin logic for reused rules
pandajedi/jediorder/TaskRefiner.py	Adds logic to update to_staging_datasets with datasets from to_reuse_ds_list to prevent them from being incorrectly marked as no_staging

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