feat(analytics): 4h 调度分析链+CLI 回填+full_sync 夜间自愈步

- scheduler: yunke_analytics_tick job(与消息增量同节奏 IntervalTrigger),
  _analytics_tick 纯 DB——stat_daily_staff 滚动3天刷新 + 敏感词增量扫描,
  不抢 _page_lock 无子进程,异常只记日志不断链;today 用 time.time()
  UTC epoch 喂 day_key,规避服务器非上海时区的 naive now 误判
- cli: staff-daily-stats(全量重建 rollup,幂等)+ sensitive-scan
  (默认增量水位扫描,--full 首跑建水位/新词回填历史;description 明示
  加词不回填历史)+ 幂等补种起步词库
- full_sync_all.sh: daily-stats 后追加 staff-daily-stats(rollup 随
  msg_daily_stats 重建同步自愈)
- 测试: tick 行为测试(今日 seed→stat_daily_staff 出行)+ 异常吞噬
  (monkeypatch 抛错不外抛);同步更新注册断言(3→4 jobs)

Co-Authored-By: Claude Code <noreply@anthropic.com>

yunke-server/tests/test_sync_scheduler.py

@@ -416,10 +416,13 @@ async def test_start_registers_two_jobs_with_expected_triggers(engine, session_m
     with patch.object(scheduler_module, "AsyncIOScheduler", return_value=spy):
         await sched.start()
 
-    # Three jobs registered (2026-08-21 加每周全量对齐).
-    assert spy.add_job.call_count == 3
+    # Four jobs registered (2026-08-21 加每周全量对齐;2026-09-04 加 4h 分析链).
+    assert spy.add_job.call_count == 4
     job_ids = {c.kwargs["id"] for c in spy.add_job.call_args_list}
-    assert job_ids == {"yunke_full_sync", "yunke_message_sync", "yunke_weekly_full_history"}
+    assert job_ids == {
+        "yunke_full_sync", "yunke_message_sync", "yunke_weekly_full_history",
+        "yunke_analytics_tick",
+    }
 
     # Full sync -> CronTrigger(hour=3); messages -> IntervalTrigger(hours=6).
     # add_job was called as (func, trigger, kwargs...) so trigger is args[1].
@@ -454,6 +457,16 @@ async def test_start_registers_two_jobs_with_expected_triggers(engine, session_m
     assert weekly_call.args[0].__name__ == "_safe_page_run"
     assert weekly_call.kwargs["args"] == ["full-history"]
 
+    # 2026-09-04 加 4h 分析链:纯 DB(非 _safe_page_run,无子进程),
+    # IntervalTrigger 与消息增量同节奏,不带 args。
+    tick_call = next(
+        c for c in spy.add_job.call_args_list if c.kwargs["id"] == "yunke_analytics_tick"
+    )
+    assert tick_call.args[0].__name__ == "_analytics_tick"
+    tick_interval = tick_call.args[1]
+    assert tick_interval.interval.total_seconds() == 6 * 3600
+    assert "args" not in tick_call.kwargs
+
     # coalesce=True + max_instances=1 protects against overlap.
     for c in spy.add_job.call_args_list:
         assert c.kwargs["coalesce"] is True