fix(T+): 补齐指导成本与读取服务保护

补充业务详情指导成本入口、来源版本和历史封存保护，接入月份锁并完善权限复核。
同步接入读取服务运行状态到页面，补充前端控制、回归测试和服务端只读连接授权校验。

定向隔离测试：89 项通过，1 条既有 Starlette 弃用警告。

backend/app/models/__init__.py

@@ -31,7 +31,12 @@ from app.models.role import Permission, Role, RolePermission
 from app.models.settlement import AdjustmentOrder, MonthlySettlement, SettlementItem
 from app.models.shipment import Shipment, ShipmentItem
 from app.models.system_setting import SystemSetting
-from app.models.tplus_automation import TPlusAutomationConfig, TPlusAutomationState
+from app.models.tplus_automation import (
+    TPlusAutomationConfig,
+    TPlusAutomationState,
+    TPlusRuntimeControl,
+)
+from app.models.tplus_business_sync import TPlusBusinessDocument, TPlusBusinessSyncConfig
 from app.models.tplus_sync import (
     TPlusSyncBatch,
     TPlusSyncError,
@@ -47,11 +52,7 @@ from app.models.tplus_workbench import (
 )
 from app.models.user import User, UserRole
 
-from app.models.tplus_business_sync import TPlusBusinessDocument, TPlusBusinessSyncConfig
-
 __all__ = [
-    "TPlusBusinessDocument",
-    "TPlusBusinessSyncConfig",
     "AdjustmentOrder",
     "ApprovalOrder",
     "ApprovalStep",
@@ -95,7 +96,10 @@ __all__ = [
     "SystemSetting",
     "TPlusAutomationConfig",
     "TPlusAutomationState",
+    "TPlusBusinessDocument",
+    "TPlusBusinessSyncConfig",
     "TPlusFact",
+    "TPlusRuntimeControl",
     "TPlusSourceHead",
     "TPlusSourceLink",
     "TPlusSyncBatch",