Every host that can create a space must call this during boot, before an identity exists:
Migrations.targetVersion is what stamps a newly created space as already migrated, and a space
created without it is reported as pending migration by every host that does register them.
Register MIGRATIONS with the global registry.
Every host that can create a space must call this during boot, before an identity exists:
Migrations.targetVersionis what stamps a newly created space as already migrated, and a space created without it is reported as pending migration by every host that does register them.