imr/compound: introduce tagged_type<Tag, T>
imr/compound: introduce tagged_type<Tag, T>

avikivity/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla