Squashed 'src/machinetalk/proto/' changes from 1bc94d5..def19ec

def19ec machinetalk-protobof: update messages and type for EMC status

git-subtree-dir: src/machinetalk/proto
git-subtree-split: def19ecaf62cf1f02ff445667a1fd92d1321bb65
Merge commit 'c083693af63c3f202a3478abaf8f59a7dbcf4b8b' into machinetalk-preview-strahlex