sync_agent no longer runs ensure_user_email, ensure_repo_creation_disabled
or ensure_config_repo. swarm-controller does all three before any deploy:
CreateForgeUser sets the account email and max_repo_creation = 0 (and the
agent_token backfill re-runs CreateForgeUser), CreateRepo creates and
protects agent-configs/<agent>, AddRepoMember grants the agent write on it,
and InitAgentConfigRepo seeds it.
What goes with them: the email-aligned and repo-creation-disabled marker
paths and the legacy email-marker relocate, sparse_edit_user_option,
is_forbidden and its tests, and ensure_org_repo. A config repo deleted by
hand is no longer recreated on the next spawn; the operator recreates the
agent at swarm level. Comments in swarm-controller that described the
removed hive passes now state only the current behaviour.
Closes#4848
1de8a01936