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>

apps/backend/app/services/task_registry.py

@@ -11,6 +11,8 @@ from __future__ import annotations
 
 from dataclasses import dataclass, field
 
+from app.trace.decorators import trace_service
+
 
 @dataclass(frozen=True)
 class TaskDefinition:
@@ -95,7 +97,7 @@ DWS_TASKS: list[TaskDefinition] = [
     TaskDefinition("DWS_FINANCE_DISCOUNT_DETAIL", "折扣明细", "汇总折扣明细", "财务", "DWS"),
     # CHANGE [2026-02-19] intent: 同步 ETL 侧合并——原 DWS_RETENTION_CLEANUP / DWS_MV_REFRESH_* 已合并为 DWS_MAINTENANCE
     TaskDefinition("DWS_MAINTENANCE", "DWS 维护", "刷新物化视图 + 清理过期留存数据", "通用", "DWS", requires_window=False, is_common=False),
-    # CHANGE [2026-07-20] intent: 注册 DWS 库存汇总任务（日/周/月），依赖 DWD goods_stock_summary 加载完成（需求 12.9）
+    # CHANGE [2026-03-27] intent: 注册 DWS 库存汇总任务（日/周/月）（需求 12.9）
     TaskDefinition("DWS_GOODS_STOCK_DAILY", "库存日报", "按日粒度汇总商品库存数据", "库存", "DWS"),
     TaskDefinition("DWS_GOODS_STOCK_WEEKLY", "库存周报", "按周粒度汇总商品库存数据", "库存", "DWS"),
     TaskDefinition("DWS_GOODS_STOCK_MONTHLY", "库存月报", "按月粒度汇总商品库存数据", "库存", "DWS"),
@@ -110,6 +112,8 @@ INDEX_TASKS: list[TaskDefinition] = [
     # CHANGE [2026-02-19] intent: 补充说明 RelationIndexTask 产出 RS/OS/MS/ML 四个子指数
     TaskDefinition("DWS_RELATION_INDEX", "关系指数 (RS)", "产出 RS/OS/MS/ML 四个子指数", "指数", "INDEX"),
     TaskDefinition("DWS_SPENDING_POWER_INDEX", "消费力指数 (SPI)", "计算会员消费力指数", "指数", "INDEX"),
+    # CHANGE 2026-03-29 | DWS_TASK_ENGINE：编排后端任务引擎（完成检查→过期检查→任务生成）
+    TaskDefinition("DWS_TASK_ENGINE", "任务引擎", "编排后端任务引擎：完成检查→过期检查→任务生成", "指数", "INDEX", requires_window=False, is_common=True),
 ]
 
 # ── 工具类任务定义 ────────────────────────────────────────────
@@ -131,14 +135,17 @@ ALL_TASKS: list[TaskDefinition] = ODS_TASKS + DWD_TASKS + DWS_TASKS + INDEX_TASK
 _TASK_BY_CODE: dict[str, TaskDefinition] = {t.code: t for t in ALL_TASKS}
 
 
+@trace_service(description_zh="获取所有任务定义", description_en="Get all task definitions")
 def get_all_tasks() -> list[TaskDefinition]:
     return ALL_TASKS
 
 
+@trace_service(description_zh="按代码获取任务", description_en="Get task by code")
 def get_task_by_code(code: str) -> TaskDefinition | None:
     return _TASK_BY_CODE.get(code.upper())
 
 
+@trace_service(description_zh="按领域分组获取任务", description_en="Get tasks grouped by domain")
 def get_tasks_grouped_by_domain() -> dict[str, list[TaskDefinition]]:
     """按业务域分组返回任务列表"""
     groups: dict[str, list[TaskDefinition]] = {}
@@ -147,6 +154,7 @@ def get_tasks_grouped_by_domain() -> dict[str, list[TaskDefinition]]:
     return groups
 
 
+@trace_service(description_zh="按层级获取任务", description_en="Get tasks by layer")
 def get_tasks_by_layer(layer: str) -> list[TaskDefinition]:
     """获取指定层的所有任务"""
     layer_upper = layer.upper()
@@ -167,6 +175,7 @@ FLOW_LAYER_MAP: dict[str, list[str]] = {
 }
 
 
+@trace_service(description_zh="获取兼容任务列表", description_en="Get compatible tasks")
 def get_compatible_tasks(flow_id: str) -> list[TaskDefinition]:
     """根据 Flow 包含的层，返回兼容的任务列表"""
     layers = FLOW_LAYER_MAP.get(flow_id, [])
@@ -225,6 +234,7 @@ DWD_TABLES: list[DwdTableDefinition] = [
 ]
 
 
+@trace_service(description_zh="按领域分组获取DWD表", description_en="Get DWD tables grouped by domain")
 def get_dwd_tables_grouped_by_domain() -> dict[str, list[DwdTableDefinition]]:
     """按业务域分组返回 DWD 表定义"""
     groups: dict[str, list[DwdTableDefinition]] = {}