finish(STATE-WP-0064): cut over scheduler and split sweep errors from failures

STATE-WP-0064 cutover (state-hub only):
- Retire local custodian-sync.timer; archive units under infra/systemd/archived/
- Mark workplan finished; update infra/README, cron-migration, runbook, AGENTS.md
- Point activity-core-delegation at the consistency-sweep runbook

Consistency engine — automation error vs assessment failure:
- C-00 is an automation error; C-01..C-23 assessment failures are recorded
  for follow-up but no longer fail --remote --all scheduled sweeps (exit 0)
- Skip workplans/README.md in the workplan glob (human index, not a workplan)
- Progress events and compare script expose automation_error and
  assessment_failures separately from exit_code

tests/test_consistency_check.py

@@ -515,6 +515,14 @@ class TestConsistencyExitContract:
     def test_remote_all_treats_warning_only_as_success(self):
         assert consistency_exit_code([self._report("WARN")], remote_all=True) == 0
 
+    def test_remote_all_treats_assessment_failures_as_success(self):
+        assert consistency_exit_code([self._report("FAIL")], remote_all=True) == 0
+
+    def test_remote_all_fails_on_automation_error(self):
+        report = ConsistencyReport(repo_slug="r", repo_path="/p")
+        report.add(severity="FAIL", check_id="C-00", message="api down")
+        assert consistency_exit_code([report], remote_all=True) == 1
+
 
 class TestConsistencyMakeTargets:
     CONSISTENCY_TARGETS = [