feat: 新增42号人脸特征与72号B端关键点接口

hairline/face_landmarks.py

@@ -66,6 +66,25 @@ class FaceLandmarker:
             pass
 
 
+def to_landmark_list(landmarks):
+    from mediapipe.framework.formats import landmark_pb2
+
+    result = landmark_pb2.NormalizedLandmarkList()
+    for x, y, z in landmarks:
+        result.landmark.add(x=float(x), y=float(y), z=float(z))
+    return result
+
+
+_landmarker = None
+
+
+def get_landmarker() -> FaceLandmarker:
+    global _landmarker
+    if _landmarker is None:
+        _landmarker = FaceLandmarker(static_image_mode=True)
+    return _landmarker
+
+
 class SolutionsFaceLandmarker:
     """CPU-oriented fallback using mediapipe.solutions.face_mesh."""