feat: add /api/uptime_kuma route

apps/dashboard/backend/app/routes/uptime_kuma.py

@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends
+
+from app.models.sources import UptimeKumaSnapshot
+from app.services.aggregator import AggregatorService, get_aggregator_service
+
+
+router = APIRouter(prefix="/api", tags=["uptime_kuma"])
+
+
+@router.get("/uptime_kuma", response_model=UptimeKumaSnapshot)
+async def get_uptime_kuma(
+    aggregator: AggregatorService = Depends(get_aggregator_service),
+) -> UptimeKumaSnapshot:
+    return await aggregator.get_uptime_kuma()