Rollback demo script.

During install, KeepGrid records the IDs of roles, channels, categories, and messages it created. Rollback uses that created-item tracker as the source of truth.

Rollback deletes created channels and categories first, then created roles. Messages inside deleted channels are removed with the channel. Existing roles and channels that were skipped during install are not deleted.

If an install is already rolled back, KeepGrid returns an already-rolled-back result instead of trying to delete the same objects twice.

Discord can deny deletion if permissions changed after install. KeepGrid records removed and failed counts separately, keeps the progress log, and shows what still needs manual cleanup.

Check the public install log, confirm failed counts are zero, and run an Ops Health scan after reinstalling if you want to verify role/channel exposure.