Implement FastAPI Temporal MVP pipeline

app/workers/activities/qc_activities.py

@@ -0,0 +1,69 @@
+"""Quality-control mock activity."""
+
+from temporalio import activity
+
+from app.domain.enums import AssetType, OrderStatus, StepStatus
+from app.infra.db.models.asset import AssetORM
+from app.infra.db.session import get_session_factory
+from app.workers.activities.tryon_activities import create_step_record, jsonable, load_order_and_run, mock_uri, utc_now
+from app.workers.workflows.types import MockActivityResult, StepActivityInput
+
+
+@activity.defn
+async def run_qc_activity(payload: StepActivityInput) -> MockActivityResult:
+    """Mock automated quality control."""
+
+    async with get_session_factory()() as session:
+        order, workflow_run = await load_order_and_run(session, payload.order_id, payload.workflow_run_id)
+        step = create_step_record(payload)
+        session.add(step)
+
+        order.status = OrderStatus.RUNNING
+        workflow_run.status = OrderStatus.RUNNING
+        workflow_run.current_step = payload.step_name
+        await session.flush()
+
+        try:
+            passed = not payload.metadata.get("force_fail", False)
+            candidate_asset_ids: list[int] = []
+            candidate_uri: str | None = None
+
+            if passed:
+                candidate = AssetORM(
+                    order_id=payload.order_id,
+                    asset_type=AssetType.QC_CANDIDATE,
+                    step_name=payload.step_name,
+                    uri=mock_uri(payload.order_id, payload.step_name.value, "candidate.png"),
+                    metadata_json=jsonable({"source_asset_id": payload.source_asset_id}),
+                )
+                session.add(candidate)
+                await session.flush()
+                candidate_asset_ids = [candidate.id]
+                candidate_uri = candidate.uri
+
+            result = MockActivityResult(
+                step_name=payload.step_name,
+                success=True,
+                asset_id=candidate_asset_ids[0] if candidate_asset_ids else None,
+                uri=candidate_uri,
+                score=0.95 if passed else 0.35,
+                passed=passed,
+                message="mock success" if passed else "mock qc rejected",
+                candidate_asset_ids=candidate_asset_ids,
+                metadata={"source_asset_id": payload.source_asset_id},
+            )
+
+            step.step_status = StepStatus.SUCCEEDED if passed else StepStatus.FAILED
+            step.output_json = jsonable(result)
+            step.error_message = None if passed else "QC rejected the asset"
+            step.ended_at = utc_now()
+            await session.commit()
+            return result
+        except Exception as exc:
+            step.step_status = StepStatus.FAILED
+            step.error_message = str(exc)
+            step.ended_at = utc_now()
+            order.status = OrderStatus.FAILED
+            workflow_run.status = OrderStatus.FAILED
+            await session.commit()
+            raise