Case 147 fixture guide for Ultimate Member ownership confusion testing.
UM surfaces already available: /user/, /account/, /password-reset/, /login/, /members/.
Users: case147_owner_sub, case147_same_role_peer, case147_private_victim, case147_customer_actor, case147_admin_fixture.
Shared throwaway password: WPAuditLab-Case147!
Boundaries: owner actor, same-role unrelated peer, private victim, customer actor, administrator authorized control.
Reset token fixture stored under wp-content/uploads/wpauditlab-case147/case147-reset-fixture.txt.