refine audit-core multidriver use case roles

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a02991-be07-7bb3-8b6d-e9701b5621de

tests/test_audit_core_e2_use_case.py

@@ -131,6 +131,17 @@ def test_intent_has_independent_provenance_and_separate_roles():
 
 def test_schedule_requires_cleanup_before_finalization():
     phases = {phase.id: phase for phase in PHASE_CONTRACTS}
-    assert phases["finalize-and-deliver"].requires == ("cleanup-custody",)
+    assert phases["finalize-and-deliver"].requires == ("verify-cleanup",)
+    assert phases["verify-cleanup"].requires == ("cleanup-custody",)
     assert phases["cleanup-custody"].requires == ("delete-runner",)
     assert phases["run-probes"].requires == ("ready-runner",)
+
+
+def test_every_role_participates_in_a_phase():
+    declared = {role.id for role in ROLE_CONTRACTS}
+    scheduled = {
+        role
+        for phase in PHASE_CONTRACTS
+        for role in phase.driver_roles
+    }
+    assert scheduled == declared