deduplication needs to reconcile labels

manually atteched downvote not propagated

https://github.com/dmarx/papers-feed/issues?q=is%3Aissue%20state%3Aclosed%20sort%3Aupdated-desc%20label%3AUID%3Apaper%3Aarxiv.2503.05628

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really the solution here is not to do manual code changes.

I can do a separate job to reconcile manual labels etc. Does it need to be part of the normal process? On the fence.

No file, test, or entry point is named. Start by locating the deduplication process and how labels are propagated, then clarify whether reconciling manually attached labels belongs in the normal process or a separate job. Done means the intended manual label reconciliation behavior is defined and downvotes are propagated consistently.

Written by the indexing model from the issue text.