fix(workbench): remove synthetic check projections

tests/unit/test_workbench_runtime.py

@@ -201,47 +201,11 @@ async def test_snapshot_projects_persisted_work_orders_and_alerts():
         "source": "生产工单系统",
         "dispatcher": "调度中心",
         "priority": "urgent",
-        "subtasks": [{
-            "id": "inspect-valve",
-            "title": "阀门开度复核",
-            "summary": "现场复核阀门开度。",
-            "status": "running",
-            "scheduled_at": NOW.replace(hour=3),
-            "location": "北区阀门 V-1",
-            "assignee": "北区班组",
-            "duration_minutes": 45,
-            "reply_window_minutes": 20,
-            "stages": [
-                {
-                    "id": "dispatch",
-                    "sequence": 1,
-                    "title": "派发",
-                    "status": "done",
-                    "owner": "调度中心",
-                    "time_label": "10:20",
-                    "description": "已派发。",
-                },
-                {
-                    "id": "execution",
-                    "sequence": 2,
-                    "title": "执行中",
-                    "status": "current",
-                    "owner": "北区班组",
-                    "time_label": "10:30—11:15",
-                    "description": "现场执行中。",
-                },
-                {
-                    "id": "reply",
-                    "sequence": 3,
-                    "title": "待复令",
-                    "status": "pending",
-                    "owner": "北区班组 → 调度中心",
-                    "time_label": "11:15—11:35",
-                    "description": "等待执行结果。",
-                },
-            ],
-            "reply_requirements": ["回传阀门开度", "复核压力"],
-        }],
+        "location": "北区阀门 V-1",
+        "assignee": "北区班组",
+        "feedback_requirements": ["回传阀门开度", "复核压力"],
+        "activity": [{"sequence": 1, "occurred_at": NOW, "actor": "调度中心",
+                      "kind": "created", "title": "工单创建", "detail": "等待现场复核。"}],
     }
     persisted_alert = {
         "alert_id": "alarm-1",
@@ -282,3 +246,5 @@ async def test_snapshot_projects_persisted_work_orders_and_alerts():
         "severity": "warning",
     }]
     assert snapshot["work_orders"][0]["code"] == "WO-20260917-001"
+    assert snapshot["work_orders"][0]["activity"][0]["title"] == "工单创建"
+    assert "subtasks" not in snapshot["work_orders"][0]