添加native.api源码；临时处理run_simulation中iot数据库name的判断

app/native/api/s42_sensor_placement.py

@@ -0,0 +1,7 @@
+from .database import *
+from .s0_base import *
+from .s42_sensor_placement import *
+import json
+
+def get_all_sensor_placements(name: str) -> list[dict[Any, Any]]:
+    return read_all(name, "select * from sensor_placement")