feat(analytics): 首响时长+回复率数据管道——消息串算法/日汇总扩展列/员工聚合

批1(A1+A2):管理层要看「每个人的响应质量」。

- 迁移 d9e0f1a2b3c4:msg_daily_stats/stat_daily_staff 各加
  cust_threads/threads_answered/fr_sum_ms(NOT NULL server_default 0,
  幂等守卫照 9b0d0c133035 惯例;models.py 双声明同步)
- summary.py _thread_stats:串=客户连续消息不被员工消息打断的段,
  is_send=None 不参与串判定;fr=员工首条回复−串末条客户消息;
  日切近似 v1(日末未闭合串计 threads 不计 answered,口径写进 docstring)
- recompute_days/recompute_all 都先按 ts 排序再算串(乱序防护)
- staff_summary 聚合三列按账号→员工累加(fr_cnt≡threads_answered 不单列)
- 测试 +10:串算法矩阵 9 例+staff 聚合传递;全量 589 绿
- 本地 86 万行回填验证:daily-stats 60s/staff 10s,rollup 总和与
  明细完全一致,随机 5 行 SQL 独立复算全对

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

yunke-server/app/storage/staff_summary.py

@@ -89,6 +89,10 @@ async def recompute_days(
                         MsgDailyStats.peer_id,
                         MsgDailyStats.send_cnt,
                         MsgDailyStats.recv_cnt,
+                        # 首响/回复率三列(2026-09-07 批1):同义聚合累加
+                        MsgDailyStats.cust_threads,
+                        MsgDailyStats.threads_answered,
+                        MsgDailyStats.fr_sum_ms,
                     ).where(
                         MsgDailyStats.day == day, MsgDailyStats.channel == channel
                     )
@@ -102,13 +106,25 @@ async def recompute_days(
             if not rows:
                 continue
             agg: dict[str, dict] = {}
-            for owner, kind, peer, s, r in rows:
+            for owner, kind, peer, s, r, t, a_ns, fr in rows:
                 uid = amap.get(owner, owner)  # 映射不上按 owner 原值(读侧标注)
                 a = agg.setdefault(
-                    uid, {"sent": 0, "recv": 0, "friends": set(), "rooms": set()}
+                    uid,
+                    {
+                        "sent": 0,
+                        "recv": 0,
+                        "friends": set(),
+                        "rooms": set(),
+                        "threads": 0,
+                        "answered": 0,
+                        "fr": 0,
+                    },
                 )
                 a["sent"] += int(s or 0)
                 a["recv"] += int(r or 0)
+                a["threads"] += int(t or 0)
+                a["answered"] += int(a_ns or 0)
+                a["fr"] += int(fr or 0)
                 if kind == "friend":  # 显式分支:未来新 kind 跳过,不误入 rooms
                     a["friends"].add(peer)
                 elif kind == "room":
@@ -123,6 +139,9 @@ async def recompute_days(
                         msg_recv=a["recv"],
                         active_friends=len(a["friends"]),
                         active_rooms=len(a["rooms"]),
+                        cust_threads=a["threads"],
+                        threads_answered=a["answered"],
+                        fr_sum_ms=a["fr"],
                     )
                 )
             n += 1