Add FastAPI backend for energy trading system

Implements FastAPI backend with ML model support for energy trading,
including price prediction models and RL-based battery trading policy.
Features dashboard, trading, backtest, and settings API routes with
WebSocket support for real-time updates.

backend/app/services/alert_service.py

@@ -0,0 +1,76 @@
+from typing import Dict, List, Optional
+from datetime import datetime
+from app.models.enums import AlertTypeEnum
+from app.models.schemas import Alert
+from app.utils.logger import get_logger
+import uuid
+
+logger = get_logger(__name__)
+
+
+class AlertService:
+    def __init__(self):
+        self._alerts: List[Alert] = []
+        self._acknowledged: List[str] = []
+
+    async def create_alert(
+        self,
+        alert_type: AlertTypeEnum,
+        message: str,
+        data: Optional[Dict] = None,
+    ) -> Alert:
+        alert_id = str(uuid.uuid4())
+        alert = Alert(
+            alert_id=alert_id,
+            alert_type=alert_type,
+            timestamp=datetime.utcnow(),
+            message=message,
+            data=data or {},
+            acknowledged=False,
+        )
+
+        self._alerts.append(alert)
+        logger.warning(f"Alert created: {alert_id}, type: {alert_type.value}, message: {message}")
+
+        return alert
+
+    async def get_alerts(
+        self,
+        alert_type: Optional[AlertTypeEnum] = None,
+        acknowledged: Optional[bool] = None,
+        limit: int = 100,
+    ) -> List[Alert]:
+        filtered = self._alerts
+
+        if alert_type:
+            filtered = [a for a in filtered if a.alert_type == alert_type]
+
+        if acknowledged is not None:
+            filtered = [a for a in filtered if a.acknowledged == acknowledged]
+
+        return filtered[-limit:]
+
+    async def acknowledge_alert(self, alert_id: str) -> Alert:
+        for alert in self._alerts:
+            if alert.alert_id == alert_id:
+                alert.acknowledged = True
+                logger.info(f"Alert acknowledged: {alert_id}")
+                return alert
+
+        raise ValueError(f"Alert not found: {alert_id}")
+
+    async def get_alert_summary(self) -> Dict:
+        total = len(self._alerts)
+        unacknowledged = len([a for a in self._alerts if not a.acknowledged])
+
+        by_type = {}
+        for alert in self._alerts:
+            alert_type = alert.alert_type.value
+            by_type[alert_type] = by_type.get(alert_type, 0) + 1
+
+        return {
+            "total_alerts": total,
+            "unacknowledged": unacknowledged,
+            "by_type": by_type,
+            "latest_alert": self._alerts[-1].timestamp if self._alerts else None,
+        }