Implement FastAPI Temporal MVP pipeline

app/domain/models/workflow_run.py

@@ -0,0 +1,21 @@
+"""Domain workflow run model."""
+
+from dataclasses import dataclass
+from datetime import datetime
+
+from app.domain.enums import OrderStatus, WorkflowStepName
+
+
+@dataclass(slots=True)
+class WorkflowRun:
+    """Business representation of a workflow execution."""
+
+    id: int
+    order_id: int
+    workflow_id: str
+    workflow_type: str
+    status: OrderStatus
+    current_step: WorkflowStepName | None
+    created_at: datetime
+    updated_at: datetime
+