With the release date set, it's time to announce the Full Freeze [1]
date: Wednesday 2023-05-24. This means that from that moment on, every
package requires a manual unblock [2] by the release team if it needs
to migrate to bookworm. Please note that, as with all freezes, the new
rules apply for all packages that haven't migrated to testing yet (not
only for uploads after the freeze).