refactor(backend): 仓储层散参数收敛为查询 DTO

仓储层的 list_*/count_* 此前以 keyword/status/offset/limit 四五个散参数
传参，调用点重复铺开、易漏传且不可扩展；按项目「参数 >4 封装 DTO」的
约定统一收敛为各模块的 Query 对象（如 RoleQuery、BusinessQuery），
服务层与测试调用同步调整，行为不变。

- repositories 层查询方法签名改为 (session, query)，分页与筛选条件
  由 Query 承载，_apply_filters 同步收口
- schemas 层补齐各模块 Query 模型（approval/business_role/report 等）
- services 层调用点同步改为传 Query
- tests 随之调整；新增用例：待办角色流转（财务通过后领导出现待办）、
  参数预览顺序稳定

验证：全量 pytest 900 passed（11:08）；单元 526 passed；ruff check 绿。

Co-Authored-By: Claude Code <noreply@anthropic.com>

backend/tests/integration/test_dashboard.py

@@ -138,9 +138,7 @@ def test_总览_绩效合计与台账一致且非法月份400(client: TestClient
         expected = Decimal(
             str(
                 session.execute(
-                    select(
-                        func.coalesce(func.sum(PerformanceLedger.performance_amount), 0)
-                    ).where(
+                    select(func.coalesce(func.sum(PerformanceLedger.performance_amount), 0)).where(
                         PerformanceLedger.settlement_month == _month(),
                         PerformanceLedger.calc_type == 1,
                         PerformanceLedger.is_active == 1,
@@ -166,16 +164,12 @@ def test_待办_待审批与未指定批次与同步降级(client: TestClient, a
     )
     assert resp.status_code == 200, resp.text
     settlement_id = resp.json()["data"]["id"]
-    resp = client.post(
-        f"{_SETTLEMENTS}/{settlement_id}/submit", headers=admin["headers"]
-    )
+    resp = client.post(f"{_SETTLEMENTS}/{settlement_id}/submit", headers=admin["headers"])
     assert resp.status_code == 200, resp.text
 
     data = _dashboard(client, admin["headers"])
     assert data["todos"]["pending_approval_total"] >= 1
-    assert any(
-        item["order_type"] == 2 for item in data["todos"]["pending_approvals"]
-    )
+    assert any(item["order_type"] == 2 for item in data["todos"]["pending_approvals"])
     assert data["todos"]["unassigned_receipt_total"] >= 1
     assert data["todos"]["unassigned_receipts"][0]["receipt_id"] == ctx["receipt"]["id"]
     # ⑥ 未建：显式降级
@@ -335,17 +329,17 @@ def test_待办_按角色仅显示可操作节点(
     assert _dashboard(client, both["headers"])["todos"]["pending_approval_total"] == 2
 
     finance_orders = {
-        item["order_no"] for item in _dashboard(client, finance["headers"])["todos"]["pending_approvals"]
+        item["order_no"]
+        for item in _dashboard(client, finance["headers"])["todos"]["pending_approvals"]
     }
     leader_orders = {
-        item["order_no"] for item in _dashboard(client, leader["headers"])["todos"]["pending_approvals"]
+        item["order_no"]
+        for item in _dashboard(client, leader["headers"])["todos"]["pending_approvals"]
     }
     assert finance_orders.isdisjoint(leader_orders)
 
 
-def test_待办_财务通过后领导出现待办(
-    client: TestClient, admin: dict, finance: dict, leader: dict
-):
+def test_待办_财务通过后领导出现待办(client: TestClient, admin: dict, finance: dict, leader: dict):
     """真实流转：财务节点通过后，条目从财务待办消失并进入领导待办。"""
     _chain(client, admin["headers"])
     resp = client.post(
@@ -353,9 +347,7 @@ def test_待办_财务通过后领导出现待办(
     )
     assert resp.status_code == 200, resp.text
     settlement_id = resp.json()["data"]["id"]
-    resp = client.post(
-        f"{_SETTLEMENTS}/{settlement_id}/submit", headers=admin["headers"]
-    )
+    resp = client.post(f"{_SETTLEMENTS}/{settlement_id}/submit", headers=admin["headers"])
     assert resp.status_code == 200, resp.text
 
     order = _dashboard(client, admin["headers"])["todos"]["pending_approvals"][0]