feat: 累积功能变更 — 聊天集成、租户管理、小程序更新、ETL 增强、迁移脚本

包含多个会话的累积代码变更：
- backend: AI 聊天服务、触发器调度、认证增强、WebSocket、调度器最小间隔
- admin-web: ETL 状态页、任务管理、调度配置、登录优化
- miniprogram: 看板页面、聊天集成、UI 组件、导航更新
- etl: DWS 新任务（finance_area_daily/board_cache）、连接器增强
- tenant-admin: 项目初始化
- db: 19 个迁移脚本（etl_feiqiu 11 + zqyy_app 8）
- packages/shared: 枚举和工具函数更新
- tools: 数据库工具、报表生成、健康检查
- docs: PRD/架构/部署/合约文档更新

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db/zqyy_app/migrations/2026-03-30__task_engine_param_tuning.sql

@@ -0,0 +1,38 @@
+-- 任务引擎参数调优（2026-03-30）
+-- 更新 cfg_task_generator_params 全局默认参数
+
+BEGIN;
+
+UPDATE biz.cfg_task_generator_params SET param_value = 7.5
+WHERE site_id IS NULL AND param_key = 'high_priority_recall_threshold';
+
+UPDATE biz.cfg_task_generator_params SET param_value = 4.0
+WHERE site_id IS NULL AND param_key = 'priority_recall_threshold';
+
+UPDATE biz.cfg_task_generator_params SET param_value = 3.0
+WHERE site_id IS NULL AND param_key = 'min_wbi_for_transfer';
+
+UPDATE biz.cfg_task_generator_params SET param_value = 0.0
+WHERE site_id IS NULL AND param_key = 'guard_assistant_coverage_ratio';
+
+UPDATE biz.cfg_task_generator_params SET param_value = 4
+WHERE site_id IS NULL AND param_key = 'max_transfer_count';
+
+-- 新增/更新升级倍数参数
+INSERT INTO biz.cfg_task_generator_params (site_id, param_key, param_value, description)
+VALUES
+    (NULL, 'escalation_comanage_multiplier', 2.5, '升级到 COMANAGE 的倍数阈值'),
+    (NULL, 'escalation_pool_multiplier', 4.0, '转移到 POOL 的倍数阈值'),
+    (NULL, 'default_ideal_interval_days', 10.0, '无历史数据时的兜底到店周期')
+ON CONFLICT (site_id, param_key) DO UPDATE SET param_value = EXCLUDED.param_value;
+
+COMMIT;
+
+-- ROLLBACK:
+-- UPDATE biz.cfg_task_generator_params SET param_value = 7.0 WHERE site_id IS NULL AND param_key = 'high_priority_recall_threshold';
+-- UPDATE biz.cfg_task_generator_params SET param_value = 5.0 WHERE site_id IS NULL AND param_key = 'priority_recall_threshold';
+-- UPDATE biz.cfg_task_generator_params SET param_value = 5.0 WHERE site_id IS NULL AND param_key = 'min_wbi_for_transfer';
+-- UPDATE biz.cfg_task_generator_params SET param_value = 0.5 WHERE site_id IS NULL AND param_key = 'guard_assistant_coverage_ratio';
+-- UPDATE biz.cfg_task_generator_params SET param_value = 2 WHERE site_id IS NULL AND param_key = 'max_transfer_count';
+-- UPDATE biz.cfg_task_generator_params SET param_value = 3.0 WHERE site_id IS NULL AND param_key = 'escalation_comanage_multiplier';
+-- UPDATE biz.cfg_task_generator_params SET param_value = 5.0 WHERE site_id IS NULL AND param_key = 'escalation_pool_multiplier';