V4 prerelease versions

Legacy V4 only

The former beta, rc, and hksv channels and unscoped package commands do not describe V5.

V4 distributed experimental builds through several npm tags and exposed an experimental-mode setting for unsupported features. Some instructions also built a local eufy-security-client submodule.

V5 enrollment is closed and its SDK prerelease is private. There is no public registration or public V5 installation channel yet.