perf: P1 性能优化批量修复 + kefu 视图拆分

P1 性能优化（避免循环内 N+1 / N 次 DB 查询）：
- shop_order_views._batch_images: 移除 ThreadPoolExecutor 掩盖的 N 次查询，改单次批量 + Python 侧分组
- product_query.DashouHuiyuanList: 5N 查询 -> 3 次批量预取 + 本地闭包判断
- roles.GetRolePermissionView / 用户列表: 循环内 RolePermission/Permission/UserRole/Role -> 批量 __in 预取
- guanli / zuzhang 杜次分红 4.2/4.3: 循环内 update_or_create + 单条 delete -> bulk_create + bulk_update + 批量 delete
- admin_config QQ 群配置: 循环内 exists/first/save/create -> 批量预取 + bulk_create + bulk_update
- jituan 服务层多处合并统计查询、批量预取 map
- rank 多处循环 N+1 改批量预取
- backend 多处循环内 count/create 改批量
- config/orders/merchant_ops 多处循环 N+1 改批量预取

其他改动：
- users/views/kefu.py 拆分为 kefu_base/kefu_dashou/kefu_orders/kefu_punishment/kefu_withdraw 5 个文件
- 删除遗留脚本 check_prod_uid.py / create_rbac_tables.sql

rank/reward_services.py

@@ -574,11 +574,36 @@ def maybe_settle_club_rewards(club_id: str, shenfen: str, riqi: str) -> Optional
         return None
 
     min_metric = scheme.min_metric or Decimal('0')
-    club_map = load_user_club_map([r['yonghuid'] for r in rows])
+    _all_uids = [r['yonghuid'] for r in rows]
+    club_map = load_user_club_map(_all_uids)
     expire_at = timezone.now() + timedelta(days=scheme.claim_days or 30)
     balance_field = BALANCE_FIELD_MAP[shenfen]
     claims_to_create = []
 
+    # 批量预取活跃用户集合，避免循环内 exists 查询
+    if shenfen == 'dashou':
+        _active_uids = set(
+            UserDashou.objects.filter(user__UserUID__in=_all_uids, zhanghaozhuangtai=1)
+            .values_list('user__UserUID', flat=True)
+        )
+    elif shenfen == 'guanshi':
+        _active_uids = set(
+            UserGuanshi.objects.filter(user__UserUID__in=_all_uids, zhuangtai=1)
+            .values_list('user__UserUID', flat=True)
+        )
+    elif shenfen == 'zuzhang':
+        _active_uids = set(
+            UserZuzhang.objects.filter(user__UserUID__in=_all_uids, zhuangtai=1)
+            .values_list('user__UserUID', flat=True)
+        )
+    elif shenfen == 'shangjia':
+        _active_uids = set(
+            UserShangjia.objects.filter(user__UserUID__in=_all_uids, zhuangtai=1)
+            .values_list('user__UserUID', flat=True)
+        )
+    else:
+        _active_uids = set()
+
     for idx, row in enumerate(rows):
         mingci = idx + 1
         metric = Decimal(str(row['metric'] or 0))
@@ -590,7 +615,7 @@ def maybe_settle_club_rewards(club_id: str, shenfen: str, riqi: str) -> Optional
         uid = row['yonghuid']
         if club_map.get(uid) != club_id:
             continue
-        if not user_has_active_shenfen(uid, shenfen):
+        if uid not in _active_uids:
             continue
         idem = f'{club_id}|{scheme.id}|{period_key}|{uid}'
         claims_to_create.append(RankRewardClaim(
@@ -618,14 +643,14 @@ def maybe_settle_club_rewards(club_id: str, shenfen: str, riqi: str) -> Optional
                 sort_field=scheme.sort_field,
                 claim_count=0,
             )
-            created = 0
-            for claim in claims_to_create:
-                claim.settlement_id = settlement.id
-                try:
-                    claim.save()
-                    created += 1
-                except IntegrityError:
-                    pass
+            # 批量创建 claims，用 ignore_conflicts 处理幂等冲突
+            if claims_to_create:
+                for claim in claims_to_create:
+                    claim.settlement_id = settlement.id
+                RankRewardClaim.objects.bulk_create(claims_to_create, ignore_conflicts=True)
+                created = RankRewardClaim.objects.filter(settlement_id=settlement.id).count()
+            else:
+                created = 0
             settlement.claim_count = created
             settlement.save(update_fields=['claim_count'])
             return settlement