Ensure cameras follow same order when (de)serializing

sleap/io/cameras.py

@@ -1581,10 +1581,13 @@ def to_session_dict(
         # Unstructure `CameraCluster` and `metadata`
         calibration_dict = self.camera_cluster.to_calibration_dict()
 
+        # Sort `Camcorder`s following same schema as when deserializing
+        self.camera_cluster.cameras.sort(key=lambda x: x.name)
+
         # Store camcorder-to-video indices map where key is camcorder index
         # and value is video index from `Labels.videos`
         camcorder_to_video_idx_map = {}
-        for cam_idx, camcorder in enumerate(self.camera_cluster):
+        for cam_idx, camcorder in enumerate(self.camera_cluster.cameras):
             # Skip if Camcorder is not linked to any Video
             if camcorder not in self._video_by_camcorder:
                 continue
@@ -1644,6 +1647,9 @@ def from_session_dict(
             calibration_dict
         )
 
+        # Ensure `Camcorder`s are in the same order as they were serialized
+        session.camera_cluster.cameras.sort(key=lambda x: x.name)
+
         # Retrieve all `Camcorder` and `Video` objects, then add to `RecordingSession`
         camcorder_to_video_idx_map = session_dict["camcorder_to_video_idx_map"]
         for cam_idx, video_idx in camcorder_to_video_idx_map.items():