feat(backthink/admin): ③b — rag/delete 真实现 + D1 推送出口钩子(自建优先→个推兜底) + api-reference 补 D2/D3/D5 补丁

- B5: POST /admin/rag/delete 真做(DeleteDocument→DeleteProject 级联删章节+索引清理, owner+审计, 200/404/500, 500降级兜底); users/iot scenarios+rules 诚实501(无用户表/IoT场景规则模型, 消息写明缺什么, 不伪造), 锁住 501+not_implemented
- D1: backthink/push_outlet.go PushExporter{Export}; pushOutlet 自建HTTP(2xx=送达, token仅Authorization头+error脱敏)优先→Getui兜底(未接入, 诚实日志'getui not integrated'+(false,nil)); backthink.Deps.Exporter → pusher.withExporter, Push 在WS/IM后 exportAsync(detached+5s超时, 失败仅日志, 不破坏现有投递, 限流不上报); config PushOutletConfig(PUSH_EXPORTER_* + GETUI_*占位)
- 前端 Rag.tsx/api.ts 删除后 reload + 类型; Docs/api-client v0.31 + api-reference(#23 owner/200-404, §8.4, 端点表PATCH/DELETE messages + pinned + messages?q=)
- 测试(push_outlet/admin_rag_delete/admin_honest501/knowledge store), 后端+前端build全绿+3平台交叉编译
- 刻意: Getui SDK 未接入(无SDK不硬造), 主人自建服务填 PUSH_EXPORTER_URL/TOKEN 即可

internal/services/gateway/admin_write_iot_automations.go

@@ -56,17 +56,29 @@ func (s *Server) adminIoTControl(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, iotDeviceSummary{ID: dev.ID, Name: dev.Name, Type: dev.Type, State: dev.State, Online: dev.Online})
 }
 
-// adminIoTScenario answers honestly: the IoT subsystem has no scenario store yet
-// (it owns device list/control/status only), so scenario write lands in M10.
+// adminIoTScenario answers honestly: the IoT subsystem owns device
+// list/control/status only (the Provider interface has no scenario model or
+// store), so there is nothing to persist a scenario into. It reports the missing
+// store rather than fabricating one.
 func (s *Server) adminIoTScenario(w http.ResponseWriter, r *http.Request) {
 	s.auditClaims(r, "iot.scenario", "error")
-	writeError(w, &apperr.AppError{Code: "not_implemented", Message: "IoT 场景存储为 M10 提供（当前 IoT 仅有设备列表/控制/状态）", HTTPCode: http.StatusNotImplemented})
+	writeError(w, &apperr.AppError{
+		Code:     "not_implemented",
+		Message:  "IoT 场景未实现：IoT 子系统仅有设备列表/控制/状态（Provider 接口无场景模型与存储）；场景 CRUD 需先新增模型 + 执行器",
+		HTTPCode: http.StatusNotImplemented,
+	})
 }
 
-// adminIoTRule answers honestly: no IoT automation-rule store exists yet.
+// adminIoTRule answers honestly: no IoT automation-rule model or store exists
+// (the generic automations service runs cron/event rules, not device-state
+// conditions with device actions), so a rule cannot be persisted or executed.
 func (s *Server) adminIoTRule(w http.ResponseWriter, r *http.Request) {
 	s.auditClaims(r, "iot.rule", "error")
-	writeError(w, &apperr.AppError{Code: "not_implemented", Message: "IoT 自动化规则存储为 M10 提供（当前 IoT 仅有设备列表/控制/状态）", HTTPCode: http.StatusNotImplemented})
+	writeError(w, &apperr.AppError{
+		Code:     "not_implemented",
+		Message:  "IoT 自动化规则未实现：IoT 子系统无规则模型与存储（通用 automations 服务只跑 cron/事件规则，不含设备状态条件 + 设备动作执行器）",
+		HTTPCode: http.StatusNotImplemented,
+	})
 }
 
 // mapIotError maps iot sentinel errors to HTTP errors.