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

scripts/compare_consistency_sweep_parallel.py

@@ -59,7 +59,10 @@ def main(argv: list[str] | None = None) -> int:
             "events": len(details),
             "completed": sum(1 for detail in details if not detail.get("lock_skipped")),
             "lock_skipped": sum(1 for detail in details if detail.get("lock_skipped")),
-            "hard_fail_exit": sum(1 for detail in details if detail.get("exit_code") == 1),
+            "automation_error": sum(1 for detail in details if detail.get("automation_error")),
+            "assessment_failures": sum(
+                detail.get("assessment_failures", 0) for detail in details
+            ),
             "repos_processed": sum(len(detail.get("repos_processed") or []) for detail in details),
             "budget_skipped_repos": sum(len(detail.get("skipped_budget") or []) for detail in details),
             "exit_codes": dict(Counter(detail.get("exit_code") for detail in details)),
@@ -76,7 +79,8 @@ def main(argv: list[str] | None = None) -> int:
         print(f"  events:          {stats['events']}")
         print(f"  completed:       {stats['completed']}")
         print(f"  lock_skipped:    {stats['lock_skipped']}")
-        print(f"  hard_fail_exit:  {stats['hard_fail_exit']}")
+        print(f"  automation_error: {stats['automation_error']}")
+        print(f"  assessment_fail: {stats['assessment_failures']}")
         print(f"  repos_processed: {stats['repos_processed']}")
         print(f"  budget_skipped:  {stats['budget_skipped_repos']}")
         print(f"  exit_codes:      {stats['exit_codes']}")