refactor(server): user_agent/steward/ocr 等服务重构并适配关联任务

- user_agent 拆分 application/locations/knowledge/response/review 四个子模块，接入申请位置语义与关联草稿分支
- steward planner/runtime/slot/plan_builder 决策链路重构，travel_reimbursement_calculator/orchestrator_expense_query 适配
- ocr/document_preview/document_intelligence/receipt_folder 复用预览与资产缓存，expense_claim_draft_flow/application_handoff 适配
- pyproject.toml 新增依赖，paddleocr bootstrap 脚本与 server_start.sh 调整
- 更新差旅/交通/通信等财务规则表，同步 document_intelligence/ocr/receipt_folder/user_agent 等测试

server/tests/test_notification_states.py

@@ -85,6 +85,31 @@ def test_notification_state_service_persists_user_scoped_read_and_hidden_state()
         assert other_saved.states[0].hidden_at is None
 
 
+def test_notification_state_storage_ready_runs_once_per_database_bind(monkeypatch) -> None:
+    with build_session() as db:
+        service = NotificationStateService(db)
+        user = CurrentUserContext(username="alice", name="Alice", role_codes=[], is_admin=False)
+        calls: list[object] = []
+        original_create_all = Base.metadata.create_all
+
+        def track_create_all(*args, **kwargs):
+            calls.append(kwargs.get("bind"))
+            return original_create_all(*args, **kwargs)
+
+        monkeypatch.setattr(Base.metadata, "create_all", track_create_all)
+
+        service.list_states(user)
+        service.list_states(user)
+        service.patch_states(
+            NotificationStateBatchPatch(
+                states=[NotificationStatePatch(notification_id="workbench:todo:EXP-002", read=True)]
+            ),
+            user,
+        )
+
+        assert len(calls) == 1
+
+
 def test_notification_state_endpoint_reads_and_updates_current_user_state() -> None:
     client = build_client()
     headers = {"x-auth-username": "alice", "x-auth-name": "Alice"}