feat: 2026-04-15~05-02 累积变更基线 — AI 重构 + Runtime Context + DWS 修复

涵盖（每条对应已存的审计记录）：
- AI 模块拆分：apps/backend/app/ai/apps -> prompts/（8 个 APP + app2a 派生）
  audit: 2026-04-20__ai-module-complete.md
- admin-web AI 管理套件：AIDashboard / AIOperations / AIRunLogs / AITriggers / TriggerManager
  audit: 2026-04-21__admin-web-ai-management-suite.md
- App2 财务洞察 prompt v3 -> v5.1 + 小程序 AI 接入（chat / board-finance）
  audit: 2026-04-22__app2_prompt_v5_1_and_miniprogram_ai_insight.md
- App2 prewarm 全过滤器 + AI 触发器 cron reschedule
  audit: 2026-04-21__app2-finance-prewarm-all-filters.md
  migration: 20260420_ai_trigger_jobs_and_app2_prewarm.sql / 20260421_app2_prewarm_cron_reschedule.sql
- AppType 联合类型对齐 + adminAiAppTypes.test.ts
  audit: 2026-04-30__admin_web_ai_app_type_alignment.md
- DashScope tokens_used 提取修复
  audit: 2026-04-30__backend_dashscope_tokens_used_extraction.md
- App3 线索完整详情 prompt
  audit: 2026-05-01__backend_app3_full_detail_prompt.md
- Runtime Context 沙箱（5-1~5-2 主线）：
  - 后端 schema/service + admin_runtime_context / xcx_runtime_clock 两个 router
  - admin-web RuntimeContext.tsx + miniprogram runtime-clock.ts
  - migration: 20260501__runtime_context_sandbox.sql
  - tools/db/verify_admin_web_sandbox.py + verify_sandbox_end_to_end.py
  - database/changes: 7 份 sandbox_* 验证报告
- 飞球 DWS 修复：finance_area_daily 区域汇总 + task_engine 调整
  + RLS 视图业务日上界（migration 20260502 + scripts/ops/gen_rls_business_date_migration.py）

合规：
- .gitignore 启用 tmp/ 排除
- 不入仓：apps/etl/connectors/feiqiu/.env（API_TOKEN secret，本地修改保留）

待验证清单：
- docs/audit/changes/2026-05-04__cumulative_baseline_pending_verification.md
  每个主题的功能完整性 / 上线验证几乎都未收口，按优先级 P0~P3 逐一处理

apps/backend/app/ai/dispatcher.py

@@ -207,6 +207,25 @@ class AIDispatcher:
 
         # 内存 trigger_job 计数器（DB 迁移完成后改为 INSERT RETURNING id）
         self._next_job_id = 1
+        self._running_tasks: dict[int, asyncio.Task] = {}
+        self._running_task_sites: dict[int, int] = {}
+
+    def _forget_running_task(self, job_id: int) -> None:
+        self._running_tasks.pop(job_id, None)
+        self._running_task_sites.pop(job_id, None)
+
+    def cancel_running(self, site_id: int) -> int:
+        """取消当前进程内指定门店未完成的 AI 调用链。"""
+        cancelled = 0
+        for job_id, task in list(self._running_tasks.items()):
+            if self._running_task_sites.get(job_id) != site_id:
+                continue
+            if task.done():
+                self._forget_running_task(job_id)
+                continue
+            task.cancel()
+            cancelled += 1
+        return cancelled
 
     # ── 统一事件入口 ─────────────────────────────────────
 
@@ -242,7 +261,10 @@ class AIDispatcher:
         self._dedup_set.add(dedup_key)
 
         # 后台异步执行调用链，不阻塞返回
-        asyncio.create_task(self._execute_chain(job_id, event))
+        task = asyncio.create_task(self._execute_chain(job_id, event))
+        self._running_tasks[job_id] = task
+        self._running_task_sites[job_id] = event.site_id
+        task.add_done_callback(lambda _task, _job_id=job_id: self._forget_running_task(_job_id))
         return job_id
 
     # ── 调用链分发 ───────────────────────────────────────
@@ -278,6 +300,10 @@ class AIDispatcher:
             await asyncio.wait_for(handler(event), timeout=chain_timeout)
             logger.info("调用链完成: job_id=%d event_type=%s", job_id, event.event_type)
             _update_trigger_job_status(job_id, "completed", set_finished=True)
+        except asyncio.CancelledError:
+            logger.warning("调用链已取消: job_id=%d event_type=%s", job_id, event.event_type)
+            _update_trigger_job_status(job_id, "cancelled", error_message="业务运行上下文切换取消", set_finished=True)
+            raise
         except asyncio.TimeoutError:
             logger.error("调用链超时: job_id=%d event_type=%s", job_id, event.event_type)
             _update_trigger_job_status(job_id, "failed", error_message="调用链超时", set_finished=True)