feat(scada): add calibrated monitoring and incident recovery

tests/unit/test_peripheral_task_sync.py

@@ -255,7 +255,7 @@ async def test_created_work_order_receipt_preserves_projection_and_routes_active
                 "title": "采样工单", "priority": "normal",
                 "work_order_type": "general", "created_at": "2026-09-23T08:00:00Z",
                 "scheduled_at": None,
-                "activity": ([{"sequence": 2, "occurred_at": "2026-09-23T09:00:00Z", "actor": "现场人员",
+                "activity": ([{"sequence": 2, "occurred_at": "2026-09-23T08:45:00Z", "actor": "现场人员",
                                "kind": "feedback", "title": "现场反馈", "detail": "复测余氯0.2mg/L"}]
                              if order_revision > 1 else []),
             }
@@ -271,6 +271,8 @@ async def test_created_work_order_receipt_preserves_projection_and_routes_active
             assert ("work_order_snapshot" in payload) == request.url.path.endswith(f"{projection_id}/external-feedback")
             if order_revision > 1:
                 assert "复测余氯0.2mg/L" in payload["evidence"]["summary"]
+                assert payload["occurred_at"] == "2026-09-23T08:45:00Z"
+                assert payload["evidence"]["observed_at"] == "2026-09-23T08:45:00Z"
             return httpx.Response(200, json={})
         if request.url.path.endswith(investigation_id):
             return httpx.Response(200, json={"actions": [{"kind": "create_work_order", "receipt": {