Implement FastAPI Temporal MVP pipeline

app/application/services/asset_service.py

@@ -0,0 +1,26 @@
+"""Asset application service."""
+
+from fastapi import HTTPException, status
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.api.schemas.asset import AssetRead
+from app.infra.db.models.asset import AssetORM
+from app.infra.db.models.order import OrderORM
+
+
+class AssetService:
+    """Application service for asset queries."""
+
+    async def list_order_assets(self, session: AsyncSession, order_id: int) -> list[AssetRead]:
+        """Return all assets belonging to an order."""
+
+        order = await session.get(OrderORM, order_id)
+        if order is None:
+            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Order not found")
+
+        result = await session.execute(
+            select(AssetORM).where(AssetORM.order_id == order_id).order_by(AssetORM.created_at.asc())
+        )
+        return [AssetRead.model_validate(asset) for asset in result.scalars().all()]
+