API-based version of duplicates bot (#48041)

This is still only a debugging/evaluation version (which is why it has
e.g. hardcoded stuff). It successfully ran a few times triggered
manually, so we're replacing the broken version on `main` with this to
see how it fares on incoming issues.

Release Notes:

- N/A
325afbddffLena committed on 1/30/2026, 6:33:50 PM· committed by GitHubparenta7596c4
1 file changedLine totals unavailable