ems-core v1.0.0: Standard EMS platform core

Shared backend + frontend for multi-customer EMS deployments.
- 12 enterprise modules: quota, cost, charging, maintenance, analysis, etc.
- 120+ API endpoints, 37 database tables
- Customer config mechanism (CUSTOMER env var + YAML config)
- Collectors: Modbus TCP, MQTT, HTTP API, Sungrow iSolarCloud
- Frontend: React 19 + Ant Design + ECharts + Three.js
- Infrastructure: Redis cache, rate limiting, aggregation engine

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/tests/test_monitoring.py

@@ -0,0 +1,44 @@
+import pytest
+from conftest import auth_header
+
+
+class TestDeviceRealtime:
+    async def test_get_device_realtime(self, client, admin_user, admin_token, seed_devices, seed_energy_data):
+        device = seed_devices[0]
+        resp = await client.get(
+            f"/api/v1/monitoring/devices/{device.id}/realtime",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        body = resp.json()
+        assert "device" in body
+        assert "data" in body
+        assert body["device"]["id"] == device.id
+
+    async def test_get_device_realtime_no_device(self, client, admin_user, admin_token):
+        resp = await client.get(
+            "/api/v1/monitoring/devices/99999/realtime",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        body = resp.json()
+        assert body["device"] is None
+
+    async def test_get_device_realtime_unauthenticated(self, client):
+        resp = await client.get("/api/v1/monitoring/devices/1/realtime")
+        assert resp.status_code == 401
+
+
+class TestEnergyFlow:
+    async def test_get_energy_flow(self, client, admin_user, admin_token, seed_devices, seed_energy_data):
+        resp = await client.get("/api/v1/monitoring/energy-flow", headers=auth_header(admin_token))
+        assert resp.status_code == 200
+        body = resp.json()
+        assert "nodes" in body
+        assert "links" in body
+        assert len(body["nodes"]) == 4
+        assert len(body["links"]) == 4
+
+    async def test_get_energy_flow_unauthenticated(self, client):
+        resp = await client.get("/api/v1/monitoring/energy-flow")
+        assert resp.status_code == 401