feat(timeseries): unify element history queries

app/infra/db/postgresql/scada.py

@@ -9,7 +9,7 @@ from app.native.wndb.core.database import read_all, try_read
 
 _SCADA_VIEW_SELECT = """
     SELECT id AS device_id, device_type, node_id, link_id, api_query_id,
-           transmission_mode, transmission_frequency, reliability, x, y,
+           measurement_unit, transmission_mode, transmission_frequency, reliability, x, y,
            ST_X(ST_Transform(geom, 4326)) AS longitude,
            ST_Y(ST_Transform(geom, 4326)) AS latitude
     FROM gis.scada_devices
@@ -57,6 +57,7 @@ def _device(record: dict[str, Any]) -> dict[str, Any]:
         "node_id": _optional_text(record["node_id"]),
         "link_id": _optional_text(record["link_id"]),
         "api_query_id": _optional_text(record["api_query_id"]),
+        "measurement_unit": str(record["measurement_unit"]).strip(),
         "transmission_mode": record["transmission_mode"],
         "transmission_frequency": record["transmission_frequency"],
         "reliability": _optional_int(record["reliability"]),
@@ -105,6 +106,22 @@ class ScadaInfoRepository:
             )
             return {str(row["device_id"]).strip() for row in await cur.fetchall()}
 
+    @staticmethod
+    async def get_scadas_for_elements(
+        conn: AsyncConnection,
+        node_ids: list[str],
+        link_ids: list[str],
+    ) -> list[dict[str, Any]]:
+        if not node_ids and not link_ids:
+            return []
+        async with conn.cursor() as cur:
+            await cur.execute(
+                _SCADA_VIEW_SELECT
+                + " WHERE node_id = ANY(%s) OR link_id = ANY(%s) ORDER BY device_id",
+                (node_ids, link_ids),
+            )
+            return [_device(record) for record in await cur.fetchall()]
+
 
 def get_scada_info_schema(name: str) -> dict[str, dict[str, Any]]:
     return {
@@ -113,6 +130,7 @@ def get_scada_info_schema(name: str) -> dict[str, dict[str, Any]]:
         "node_id": {"type": "str", "optional": True, "readonly": True},
         "link_id": {"type": "str", "optional": True, "readonly": True},
         "api_query_id": {"type": "str", "optional": True, "readonly": True},
+        "measurement_unit": {"type": "str", "optional": False, "readonly": True},
         "transmission_mode": {"type": "str", "optional": False, "readonly": True},
         "transmission_frequency": {"type": "str", "optional": False, "readonly": True},
         "reliability": {"type": "int", "optional": False, "readonly": True},