batches: enqueue syncs when repos are archived or unarchived by repo-updater
Created by: LawnGnome
TODO:
- Unit tests.
- Figure out if we're going to overwhelm the priority queue for changeset syncing.
- Figure out if this is a good idea at all.
- Is it kosher to call into repo-updater from the reconciler worker?
Closes #26820 (closed).