Add demo raster workflow smoke

backend/tests/test_raster_operations_service.py

@@ -599,7 +599,12 @@ def test_raster_tile_returns_manifest_payload(monkeypatch, tmp_path) -> None:
 
         @staticmethod
         def bounds(window: FakeWindow, _source_transform):
-            return FakeWindowBounds(window.xoff, window.yoff, window.width, window.height)
+            return (
+                float(window.xoff),
+                float(window.yoff),
+                float(window.xoff + window.width),
+                float(window.yoff + window.height),
+            )
 
     class FakeSource:
         width = 10
@@ -666,6 +671,7 @@ def test_raster_tile_returns_manifest_payload(monkeypatch, tmp_path) -> None:
     assert payload["manifest"]["source_dataset_id"] == str(dataset_id)
     assert payload["manifest"]["source_raster_id"] == str(dataset_id)
     assert payload["manifest"]["count"] == payload["count"]
+    assert payload["manifest"]["tiles"][0]["bounds"] == [0.0, 0.0, 4.0, 4.0]
     assert payload["manifest"]["ai_inference"] is False
     assert payload["manifest"]["tile_server"] is None