added ruff test

docs/architecture/studio-3d-contracts.pyi

@@ -6,19 +6,20 @@ All published NumPy arrays must be C-contiguous and read-only (frozen dataclasse
 alone do not freeze ndarray contents). Shapes are contractual, not type-checked
 by NDArray. See studio-3d-design.md for threading and validation requirements.
 """
+from collections.abc import Callable, Mapping
+from concurrent.futures import Executor
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Callable, Generic, Literal, Mapping, Protocol, TypeAlias, TypeVar
-from concurrent.futures import Executor
+from typing import Generic, Literal, Protocol, TypeAlias, TypeVar
 
 import numpy as np
 from numpy.typing import NDArray
+from orisys.finger.runtime import FingerRuntime
+from orisys_app_shared.acquisition.models import SdkPacket
 from PySide6.QtCore import QEvent, SignalInstance
 from PySide6.QtGui import QMouseEvent, QOpenGLContext, QWheelEvent
 from PySide6.QtOpenGLWidgets import QOpenGLWidget
 from PySide6.QtWidgets import QWidget
-from orisys_app_shared.acquisition.models import SdkPacket
-from orisys.finger.runtime import FingerRuntime
 
 F32: TypeAlias = NDArray[np.float32]
 F64: TypeAlias = NDArray[np.float64]
@@ -305,7 +306,6 @@ class LatestFrameMailbox(Generic[T]):
     def __init__(self) -> None: ...
     def offer(self, frame: T) -> OfferResult:
         """Thread-safe capacity-one replacement, constant-time under the lock."""
-        ...
     def take(self) -> T | None: ...
     def clear(self) -> None: ...
     @property
@@ -323,7 +323,6 @@ class OrbitCamera(Protocol):
 
 def configure_surface_format(profile: Profile) -> None:
     """Before QApplication and before importing a platform-specific GL binding."""
-    ...
 
 
 class GLDispatch(Protocol):
@@ -351,7 +350,6 @@ class Sensor3DWidget(QOpenGLWidget):
                  parent: QWidget | None = None) -> None: ...
     def set_scene(self, assets: SceneAssets) -> None:
         """GUI: retain CPU data, schedule upload when context is current."""
-        ...
     def present(self, frame: RenderFrame) -> None: ...
     def set_settings(self, settings: DisplaySettings) -> None: ...
     def initializeGL(self) -> None: ...